There are countless reasons for growing apple trees – harvesting homegrown apples, enjoying part of history, the sense of pride of growing your own, and so on.
When learning about how to grow apple trees, there are some key things to keep in mind.
In “Getting Started”, you’ll need to pay careful attention when choosing a location for planting new apple trees. This involves making a plan in the best interest of the apple trees prior to planting – like covering pollination needs, accommodating for sun and soil requirements, and spacing to avoid obstacles in the planting site. Find out about some common soil types, and when and how to prepare your soil prior to planting. You’ll also learn about planting grafted apple trees, including how to plant bare-root and potted apple trees. Hint: they’re both easy to do!
Moving on to the “Care & Maintenance” aspect of growing apple trees, you can read about how often and how much to water apple trees, so that you can avoid water-related stress and issues that can arise as a result of overwatering. This section also covers pruning apple trees, which prefer a central- or main-leader structure, to keep a good balance of fruiting and vegetative wood – important for the longevity and productivity of an apple tree. Also, get a good idea about when and what you can use to fertilize new and mature apple trees, and when to stop fertilizing to avoid complications with winter injury later on. Discuss some common apple tree pests and diseases while learning about spraying – including how to control existing issues and use prevention methods to avoid potential problems altogether.
We elaborate on all these topics and more – like harvesting – in this series of articles. You can jump to any specific article using the “In This Series” menu, or follow along with the navigation markers at the end of each article.
Acclimate (ac·cli·mate): "To become accustomed to a new climate or to new conditions. Also to harden off a plant."
Acclimating apple trees helps to minimize environmental stress when planting. Since our potted apple trees are grown in the controlled environment of our greenhouses, they may arrive to you already sporting tender new growth. This growth can be sensitive to things like direct sunlight and sudden changes in temperature, so acclimating these apple trees to their new environment will help provide a great start.
Things that may cause injury to tender new growth in transplants:
These conditions are more likely to occur during early spring, but can be expected during different times of year in different areas. Here are a few steps we recommend you follow to acclimate (or harden off) your apple trees prior to planting outdoors:
Allow your tree’s roots to soak in water an hour or two before planting. Do not soak the roots for more than 24 hours.
Bare-root trees are not grown in a pot and will not have any soil around their roots – hence the name “bare root”. Our bare-root trees are shipped dormant, which helps them to transplant well and experience less transpiration (water loss) immediately after planting. The best thing you can do for a new tree is to avoid shock as much as possible, so don’t wait until it’s too late in the season to plant. The best time to plant a bare-root tree, or any other bare-root plant, is in the fall or early spring.
If your new plants or trees from Stark Bro’s arrive in a pot and already display tender leafy growth, then they were likely grown in our greenhouses. Here are a few steps we recommend you follow to acclimate these plants and trees (or harden them off) before planting outdoors:
Please note: these are general recommendations. Your particular growing environment might require a slight variation on these guidelines since some plants can take more time (or less time) than others to harden off. Factors like the current year’s weather, individual plants, and your location may affect the process. If conditions outdoors are too harsh, keep potted plants near a sunny window, water them, and take care of like a houseplant. Then start the process of hardening off your plants.
The best way to succeed is to plan before you plant. Let’s discuss location: Do you know where you want to plant your new apple trees? Avoid many future problems by considering all aspects of the planting spot, such as:
Is a compatible pollinator-variety present? Cross-pollination by a different variety (like Fuji, Gala, Granny Smith, etc.) of the same type of tree (apples to apples) is key to the fruiting success of an apple tree. In most cases, the lack of a compatible pollinator variety is why apple trees produce poorly, or don’t bear fruit at all. Since insects and wind need to carry pollen from blossom to blossom between trees, apple trees and their pollen partners should be planted nearby – within 100 feet of one another for adequate cross-pollination to occur.
There are a few varieties of apple trees that are self-pollinating, meaning your tree will still bear apples when it matures, without requiring another apple variety’s pollen. If you are limited on space, consider planting a self-pollinating apple tree like these:
Apple trees thrive when growing in a location that receives full sun and has a well-drained, fertile soil.
Full sun translates to at least six- to eight-hours of sunlight during the growing season. Light is vital to fruit production and fruit quality, and also helps keep fungal issues from advancing, so be sure to keep this in mind when choosing a location for your new apple trees.
Good soil drainage is necessary to keep an apple tree’s roots healthy, and healthy roots are the foundation of a healthy tree. If you discover that your native soil is composed of heavy clay that retains water after rainy weather, you should choose a different site for your apple tree. Similarly, if your site has fast-draining, sandy soil, then your apple tree may exhibit water-related stress (similar to conditions of drought) and may require more-frequent watering. For your growing success, we do not recommend planting apple trees in rocky or heavy, pure-clay soils. If you can’t plant elsewhere, you can try amending the soil of your planting site prior to planting your apple trees.
Amending the soil greatly depends on your individual location, so communicating with your local county cooperative extension is a wise first step. In general – to help with water distribution – you can add coir, like our Coco-Fiber Growing Medium, to your apple tree’s planting hole or mix in one-third sphagnum/peat to the soil at planting time.
Alternately, to avoid directly dealing with your native soil, you can build a bottomless raised bed (at least 12-inches deep and at least 3- to 4-feet around) in which to plant your apple tree. You can also plant apple trees in containers, starting with a pot that accommodates each apple tree’s current root system (with room to grow). Most new apple trees can be planted in a 5-gallon container to start, and you can pot-up container-grown apple trees into larger containers as the trees outgrow them.
Even if your yard isn’t the most ideal location, take heart. Apple trees can be very adaptable and they respond well to soil additives like compost or fertilizers, so they can get along well even where the soil is nutritionally poor. Just remember to avoid planting sites with extremely heavy soils and poor drainage.
Apple trees can also become a landscaping asset, so choose a planting site with this in mind. Imagine your new apple tree as a full-grown tree and check everything out:
Even a year or two after planting, an apple tree can be very difficult to successfully transplant, so take the time to plant it in just the right place the first time around.
Growers often ask about the recommended planting distances for apple trees to keep them away from patios, sewer lines, water pipes, etc. Ordinarily, patios will not be a problem because the soil beneath them is dry and compacted. The roots will not be as encouraged to grow into this area; however, it’s better to plant with at least 8 to 10 feet of space between these structures and your apple trees. A smart distance is somewhere beyond your apple tree’s estimated maximum spread. This is roughly equal to the mature height of the apple tree you choose to plant (for example: Dwarf, Semi-Dwarf, Standard. See recommendations for Space Between Trees and other structures below).
You might not expect sewer and water lines to be structures that are affected by planting apple trees, since they are buried so deeply, but, since sewer and water lines tend to be wet, apple tree roots will be attracted to them and grow around them if the tree is planted too near. By planting apple trees far enough away from these things, you can avoid problems in the near or distant future.
When you’re new to planting apple trees, or you’re planting apple trees in a new location, it’s wise to start with just a few apple trees at first. Later on, especially after you have reaped the rewards of growing your own apples firsthand, you may want to expand your home orchard. It’s helpful to plan to leave room for additional apple trees, or even other fruit trees, berry plants, and other garden plants. That way, the future planting sites will be available when you are ready, without hindering your existing apple trees.
Successfully establishing a young apple tree in your yard starts with your planting site and planting method. Once an apple tree is established, it needs little assistance to grow and bear fruit, but you’ll first need to make sure you give your trees a strong foundation.
Apple trees require fertile soil for good growth, so, before you plant, test the soil where your trees will be planted – including a test of the soil pH. Refer back to the section on Soil Preparation for tips on testing your soil.
If the soil pH where you plan to plant your tree is 6.0-7.0, you’re in good shape – this is an ideal range for apple trees. Take a look at the established trees and plants around the site. Check to see that they look healthy and are growing well. This will help give you an idea of the success of new plantings in the area. Remember to steer clear of soils that are extremely heavy or poorly drained.
Apple trees may be planted even when temperatures are quite cool, especially if they arrive bareroot and dormant. If a hard frost is expected, it is advisable to delay planting for a while until temperatures become more moderate. Do not expose roots to temperatures that are freezing or below. Generally, as long as your soil is workable, it is fine to plant.
Read more about Digging a Planting Hole and Planting Bare-root Fruit Trees.
Thoroughly water your newly planted apple tree. A deep soaking with about a gallon of water is best. If you need to fertilize your apple trees at planting time, you can water them in with a water-soluble solution like Stark® Tre-Pep® Fertilizer. If planting in the fall, wait until spring instead to make any fertilizer applications. After watering, if soil appears to settle and sinks into the planting hole, just add more soil – enough to fill the hole to ground level again.
Apply a layer of organic material like wood mulch (rather than inorganic material like rocks), about 2-3 inches thick, around the root zone of your apple tree. Mulching helps discourage weeds while also keeping water from quickly evaporating away from the root zone. In the fall, double the mulch layer or add a layer of straw for winter protection.
Note: Rodents and other small gnawing critters could take advantage of mulch that is applied too thickly, and they may chew the tree’s bark for sustenance – a type of injury that can be fatal, especially to new apple trees.
All Stark Bro’s apple trees are grafted or budded to ensure growth of true-to-name planting stock. You can see where the fruiting variety on top is joined to the root variety on the bottom by a bump in the lower trunk, by a change in the bark color, or by a slightly offset angle in the tree.
Grafted apple trees need special planting attention. For most apple trees, especially dwarf apple trees, it’s very important to keep the graft above the soil level; otherwise, roots could develop from above the graft and your apple tree could grow to its full size by bypassing its dwarfing parts. Budded apple trees are manually fitted to specially selected clonal rootstocks.
For dwarf, semi-dwarf, and columnar apple trees, the bud union should be planted 2- to 3-inches above the soil line. For ideal anchorage, standard-size apple trees, as well as our Stark® Custom Graft® trees, like the Stark® Double Delicious® apple tree, should be planted 1- to 2-inches deeper than the visible soil lines from when they grew in our nursery rows.
Apple trees that are grown and shipped in our Stark® EZ Start® bottomless pots are part of our continuing quest for producing better and stronger trees for the home grower. By following these simple instructions, you will be assured of getting your new potted apple tree off to the best possible start.
Note: At planting time, do not plant the Stark® EZ Start® bottomless pot in the ground. It is not intended to break down over time as your apple tree grows, and it will cause root restriction, injury, and may even be fatal to the apple tree. The pot your apple tree arrives in is intended to be a temporary container only.
One final point: Please be sure to remove the name tag from your apple tree. As the tree grows, this small piece of plastic can choke off its circulation, causing damage like girdling and even tree death. If you’d like to keep the tag on your tree, retie it loosely with soft twine and be sure to keep it from becoming restricted as the tree grows.
Preparing your soil before you plant will greatly improve your apple tree’s performance and promote healthy, new growth. It is a good idea to have your soil tested prior to planting, and even annually after planting, to determine if it is lacking in any essential minerals and nutrients. You can use one of our digital soil meters to test your soil, including its pH and moisture, or collect a soil sample to send to your local county Cooperative Extension.
The goal of soil preparation is to give your apple tree a strong foundation. This includes replenishing vital minerals and nutrients with fertilizers or organic matter, as well as breaking up and loosening compacted soils.
Soil preparation can be done at any time of year that the ground is not overly saturated with water or frozen.
Common soil amendments for apple trees:
Your lawn can provide you with ideal organic materials such as grass clippings and shredded leaves. Not only will the grass and leaves break down to provide soil nutrients naturally, but they will help loosen the soil as well. You can gather these in the fall with spring planting in mind.
Adding organic materials like compost will improve the composition of most every soil type. Organic materials bind sandy soil particles so they retain moisture and nutrients better. They also break apart clay and silt particles, so that water can soak in and roots can spread.
Fertilizing is an excellent way to replenish the nutrients in your soil, especially nitrogen. Nitrogen encourages green vegetative growth, which is exactly what you want to promote before your apple tree reaches its fruit-bearing years.
Always test your soil prior to applying any fertilizers. Different soils can have varying amounts of native elements needed to support apple tree health and development. If you discover your soil lacks any necessary nutrients (nitrogen, phosphates, potash, etc.), be sure to choose a fertilizer that supplements the soil’s nutrient deficiency.
Get to know your soil and discover the importance of soil testing prior to making any changes.
Apple varieties that are “light feeders” on Nitrogen:
Examples: Cortland Apple, Ginger Gold Apple, Golden Delicious Apple, Gravenstein Apple, Jonagold Apple, Macoun Apple, McIntosh Apple, Stark® Jon-A-Red® Jonathan Apple
Apple varieties that are “heavy feeders” on Nitrogen:
Examples: Empire Apple, Granny Smith Apple, Honeycrisp Apple, Liberty Apple, Red Stayman Winesap Apple, Rhode Island Greening Apple, Stark® BraeStar™ Apple, Starkrimson® Red Delicious Apple, Starkspur® Red Rome Beauty Apple, York Imperial Apple, Fuji apple trees, and Gala apple trees.
Apple trees and their fruit also benefit from the availability of micronutrients like Calcium. Honeycrisp apple trees in particular tend to require more calcium than other varieties, so, to avoid diminished tree- and fruit-quality due to calcium deficiency, it is wise to apply (either as a soil additive or foliar application during the growing season) a liquid calcium-supplement like Nutri-Cal®.
*To prevent the chance of injury as the growing season winds down, do not fertilize past July 1st.
Read more about fertilizing:
As it grows, an apple tree may experience issues such as the presence of pests or diseases. Factors such as location, weather, and upkeep play a part in which issues your apple tree encounters and how well it stands up against them. Disease-resistant apple trees are easy-care options for growers who prefer a low-spray or no-spray orchard, and – for all apple trees – routine maintenance* can help keep most problems at bay.
*Examples of good practices are: adequate watering, fertilizing as needed, seasonal pruning, preventative and active spraying, fall cleanup, and winter protection.
The following are merely intended as a means of identifying potential issues. Don’t be alarmed – an apple tree may experience a few of these in its lifetime, but certainly not all at once.
Tiny, pinhead-sized insects, varying in color depending on the type. Will cluster on stems and under leaves, sucking plant juices.
Symptoms: Leaves curl, thicken, yellow, and die. Aphids produce large amounts of a sticky residue called “honeydew” that attracts insects like ants. Honeydew becomes a growth medium for sooty mold.
Control: Spray
Control: Natural Spray
Adults are similar in appearance to a housefly, but smaller. Larvae are yellowish-white grubs. Traps are an option for luring adults.
Symptoms: Small, pinpoint-sting marks visible on fruit surface. Eggs are laid under fruit skin. Hatched larvae tunnel, making railroad-like mining pattern.
Control: Spray
Control: Natural Spray
Adult female moth is around 1/2-inch long; male is slightly smaller. Color varies from mottled gray to brown. Full-grown larvae are around 3/4-inch long. Pupae are brown and about 3/8-inch long.
Symptoms: Feeding occurs along leaf midrib and fruit. Shelters are created by rolling leaves and tying leaves to other leaves or fruit. Damage appears as tiny holes, irregular scarring, and areas of rot – generally found around the stem. Rot or corking around the stem occurs after the larvae have finished feeding and have pupated.
Control: Spray
Control: Natural Spray
Adults are moths, gray with brown patches on wings. Larvae are worms, about 1-inch long. Pests and damage are similar to Oriental Fruit Moth. Traps are an option for luring moths.
Symptoms: Affected fruits will have holes from outside to core.
Control: Spray
Control: Natural Spray
Adults are small brown beetles that may target the graft location (in young apple trees) for laying eggs as well as damaged or sunken areas. Grubs have horseshoe-shaped heads and cream-colored bodies. Difficult to control once infested. Preventative spraying (including the ground around the roots) is a strong defense. Traps – in the form of tanglefoot-coated logs or posts that are later removed from the site and burned – are an option for luring adults.
Symptoms: A thick, gummy substance (sap) leaking from round holes on the trunk or in a crotch of the tree. Grubs tunnel through trunks, weakening and eventually killing the tree. Eggs hatch and larvae tunnel into tree’s vascular tissue.
Control: Manual
Control: Spray
Additional Resources
Adults are moths, from cream white to grayish brown. Eggs are laid in masses along bark, limbs, and other areas on the tree and can overwinter to hatch when the weather is favorable. Eggs hatch into larvae, which are black, hairy caterpillars.
Symptoms: Defoliation through feeding – in extreme cases, severe enough defoliation to stress and weaken apple trees.
Control: Site Cleanup
Control: Natural Spray
Adult is a metallic-green beetle, which skeletonizes leaves. Larvae are cream-colored grubs that feed on turf roots prior to maturity. Turf pest-control may help reduce grub populations; check turf product labels for timing and control of grubs. Traps are an option for luring adult beetles.
Symptoms: Adults are often seen in groups – large infestations can cause stunted growth and stress by skeletonizing a majority of the leaves.
Control: Manual
Control: Spray
Small, active, slender-winged insect appearing in various colors. Usually found on undersides of leaves.
Symptoms: Slows new growth; leaves become whitened, stippled, or mottled. Leaf tips may wither and die. Prone to carrying diseases to and from plants and trees; damaged caused by leafhoppers may be greater than the feeding done directly by the insect.
Control: Spray
Control: Natural Spray
Pale yellow or green worms.
Symptoms: Leaves are rolled and webbed together where grubs feed. Foliage eventually becomes skeletonized with prolonged exposure to feeding.
Control: Spray
Control: Natural Spray
Pinpoint-sized arthropods, appearing in many different colors depending on the type. Often found on undersides of leaves.
Symptoms: Sap feeding causes a bronze appearance in leaves. Severe infestations exhibit some silken webbing. Droughts or dry spells are advantageous for mite infestations.
Control: Spray
Control: Natural Spray
Adult is brownish gray, 1/5-inch long, hard-shelled beetle with a long snout and 4 humps on its back.
Symptoms: Cuts a crescent-shaped hole in fruit skins and lays eggs inside. Grubs hatch and tunnel within fruit. Fruit may drop prematurely or have grubs/worms or tunnels inside at harvest.
Control: Site Cleanup
Control: Spray
Insects are small (1/4 to 1/3-inch long) and red with a brownish mid section and black legs. Adults make small holes in leaves and feed on developing fruit.
Symptoms: Leaves become distorted and apples rough with dimples or a series of small rust spots. Produces one generation each year with hatching occurring before blossom time.
Control: Natural Spray
Usually on bark of young twigs and branches, encrusted with small (1/16-inch) hard, circular, scaly raised bumps with yellow centers. May also be on fruit.
Symptoms: Sap feeding weakens the tree.
Control: Spray
Control: Natural Spray
Yellowish-brown, winged insect that may have black spots or red stripes.
Symptoms: Damage is caused by injecting toxins into buds and shoots, causing stunted vegetative growth and sunken areas (or “cat facing”) on fruit.
Control: Natural Spray
Adults are moths. Caterpillars are a hairy, grayish brown with cream-colored spots or stripes down the back.
Symptoms: Encases large areas in webbing and feeds on enclosed leaves.
Control: Site Cleanup
Control: Spray
Control: Natural Spray
Tiny, slender, fringed-wing insects ranging from 1/25-inch to 1/8-inch long. Nymphs are pale yellow and highly active. Adults are usually black or yellow-brown, but may have red, black, or white markings.
Symptoms: Feeding occurs on vegetation by puncturing and sucking up the contents causing appearance to be deformed or discolored (similar to damage by mites and lace bugs).
Control: Natural Spray
Caused by Cryptosporiopsis curvispora – a fungus that is spread by splashing rain or irrigation. Favors cool, wet weather (like in the fall).
Symptoms: New cankers appear on bark as small circular spots that are red or purple when wet. When they enlarge they become sunken orange to brown areas in the bark. As the cankers age, bark sloughs off exposing wood beneath, or disintegrates exposing fibers that give the area a ‘fiddle string’ appearance. Cankers usually do not grow larger after first year’s growth. Brown spots appear on leaves and fruit. At harvest, the fungus may infect the fruit. Fruit lesions are circular, brown, and sunken with gray or cream centers (Bull’s Eye rot). Disease rarely kills tree, as it is usually confined to small branches and twigs.
Control: Natural Spray
Caused by Glomerella cingulata – a fungus that is spread by splashing rain or irrigation. Favors warm, wet weather.
Symptoms: Small, brown sunken spots on fruit. Spots rapidly enlarge and deepen, and may appear as target-like concentric rings. If allowed to persist, spots worsen and spores are transmitted to nearby fruit. Spots rot fruit to the core and affected fruit will eventually mummify. Disease overwinters in mummified fruit, diseased limbs, and narrow protected areas.
Control: Site Cleanup
Control: Manual
Control: Spray
Control: Natural Spray
Caused by Botryosphaeria obtusa – a fungus that is spread by splashing rain or irrigation. Favors warm, wet weather.
Symptoms: On Fruit – Fruit infection can begin as soon as fruit begins to develop and will appear on young fruit as red flecks that develop into purple pimples. These spots do not grow much until fruit begins to mature. Spots on mature fruit are irregular – black with a red halo appearance. As the spots enlarge, a series of concentric rings form, which alternate from black to brown. Lesions stay firm and are not sunken. Fruit mummifies and remains attached to the tree. Rotting occurs in seed cavity or around core, caused by early infections, but these fruits tend to fall within a month after petal fall with no surface symptoms. On Foliage – Leaf symptoms begin 1-3 weeks after petal fall as small purple flecks. These enlarge into lesions with purple margins and tan- to brown-centers, resembling ‘frog eyes’. When heavily infected, defoliation may occur. On Limbs – May be reddish-brown sunken cankers on limbs. Winter injured trees, or dead, damaged, diseased limbs are highly susceptible to contracting these fungal issues.
Control: Site Cleanup
Control: Manual
Control: Spray
Control: Natural Spray
Caused by Gymnosporangium juniperi-virginianae – a fungus that is spread from cedars/junipers to apple trees by splashing rain or irrigation in spring. During dry weather, spores are transferred to cedars/junipers. Spores overwinter in cedar/juniper galls to start the cycle again the following year. Requires the presence of both apple trees and Eastern red cedar trees (most common) or other plants/trees in the Juniperus genus.
Symptoms: Small, pale yellow spots are present on upper leaf surfaces. Spots will enlarge and become orange with black specks in center. A mass of fungal spikes appear on undersides of leaves. Orange gelatinous galls appear in Eastern red cedar trees or plants/trees in the Juniperus genus in spring.
Control: Spray
Control: Natural Spray
Control: Manual
Additional Resources
Caused by Agrobacterium tumefaciens – a bacterium that inhabits the soil and causes rapid, abnormal growth (developing into galls). Can spread through injury to roots in the soil as well as through gardening tools carrying the bacterium.
Symptoms: Trees appear stunted and slow growing; leaves may be reduced in size. In mature, fruit-bearing aged trees, may see little or no fruit. Woody, tumor-like growths called galls appear, especially at the crown (ground level) and below. Growths can restrict water and nutrient flow, but often the damage isn’t extensive enough to cause immediate or total death. If tree has died, inspect roots for hard, woody ‘tumors’ to identify Crown Gall as the cause. Note: Crown Gall is not the only thing that can cause stunted trees.
Control: Spray
Additional Resources
Caused by Erwinia amylovora – a highly contagious bacterium that is spread to different areas (blossoms, twigs, etc.) with tender growth by wind, splashing rain or irrigation, birds, insects, and so on – especially through points of weakness like insect injury, hail damage, wind-whipping, and more. Favors cool to warm wet weather.
Symptoms: On Flowers – Blossoms and fruit spurs will look brown and withered and also look as if scorched by fire. On Foliage – Dark brown or blackened leaves appear as disease spreads. Do not confuse symptoms of fireblight for symptoms of drought, salt injury, or nutrient deficiency which may also present as browned leaves. Tips of branches curl, leaving a “Shepherd's Hook” appearance. Twigs and branches die back. On Bark – Cankers may form, housing orange bacterial ooze; the site of overwintering.
Control: Manual
Control: Site Cleanup
Control: Spray
Control: Natural Spray
Additional Resources
Caused by Podosphaera leucotricha – a fungus that overwinters in buds and emerges during humid, warm weather progressively throughout the growing season.
Symptoms: Whitish-gray powdery mold or felt-like patches on buds, young leaves, and twigs. Leaves may crinkle and curl upward. New shoots are stunted.
Control: Natural Spray
Caused by Venturia inaequalis – a fungus that overwinters in fallen leaves and pruning debris. Favors cool, wet weather (typically in spring).
Symptoms: Spots on young leaves are velvety and olive green turns black; leaves wither, curl and drop. Fruit also has spots, is deformed, knotty, cracked and drops.
Control: Manual
Control: Site Cleanup
Control: Spray
Control: Natural Spray
Additional Resources:
Caused by a complex of Peltaster fructicola, Geastrumia polystigmatis, Leptodontidium elatius, and Phyllachora pomigena as well as Schizathyrium pomi – fungal pathogens. Often develops together, since both diseases thrive under similar conditions. Each favors cool, wet weather (typically emerging in summer and early fall, but also seen in early spring).
Symptoms: Issues usually appear together. Olive-green smudges and tiny black dots on skin of apple. These fungal diseases survive on infected twigs and are spread by rains in spring and early summer. Symptoms appear as early as 2- to 3-weeks after petal fall. Damage is primarily superficial – little damage is done to the fruit’s flesh. Smudges or dots can often be rubbed or washed off with as little as water and some effort.
Control: Manual
Control: Site Cleanup
Control: Spray
Control: Natural Spray
This is a physiological disease – not one caused by fungus, bacterium, or virus – and has been related to boron deficiency or manganese toxicity.
Symptoms: Small elevations appear on surface of 1-2 year old wood. If the outer bark in the area(s) where these elevations occur is sliced away, dark dead areas will be revealed. May cause stunted terminal growth and in extreme cases, death of small terminal branches.
Control: Manual
Additional Resources
Symptoms: Apple trees take about 2 to 5 years after planting (on average) before they bloom or bear fruit. If enough time has been allowed to pass, and the apple tree is otherwise healthy, there are a few things to do to help it become fruitful.
Control: Manual
Additional Resources
Scorching or sunburn occurs during hot, dry growing seasons – with or without humidity in the air, but most commonly when humidity is low. Brown, crispy edges appear on leaves.
Symptoms: Sunscald is also called winter injury or “southwest injury” as it commonly affects the south-west side of tree trunks during winter. Warm, clear days cause bark to expand and nights that are several degrees cooler will cause the bark to contract, damaging cells and causing splits and cracks in the trunk.
Control: Manual
Additional Resources
Symptoms: Can relate to overwatering or underwatering. Overwatering commonly presents as pale green to yellow leaves and leaf drop. Can weaken a tree, lead to issues with root rot, and ultimately kill the tree. Underwatering often presents as discolored – often yellowed – dry leaves. Tree may appear to wilt overall and prolonged lack of water can kill the tree.
Control: Manual
Additional Resources
Symptoms: Can involve injury such as leaning trees, uprooted trees, breaks, tears, or wind-burned foliage. Depending on the severity of the injury, an apple tree can either bounce back from minor damage or succumb to the wind-caused harm. This is determined on an individual basis and the health of the tree before the damage occurred.
Control: Manual
Pruning is a very important part of proper apple tree care and maintenance; however, many people think the task overwhelming. It doesn’t have to be! Keep these things in mind when approaching pruning your apple trees:
When your apple tree is dug up from our fields to be shipped to you, and any time a tree is transplanted, the root ball loses many of its fine feeder roots. These hairlike, delicate roots are important to the process of absorbing moisture and nutrients in the soil. Pruning, in this instance, helps balance the top growth of your tree with the root system, giving the roots time to re-establish in your yard to support existing top growth and new growth.
When your bare-root apple tree arrives from Stark Bro’s, our professionals have already pre-pruned your tree for you. Because of this, you do not need to prune them again at planting time. The only pruning necessary at planting time would be to remove any broken or damaged branches and roots.
Plan to prune your apple trees every year during their dormant season. In Zone 6 and north, you should wait until late winter. A good reference book, such as Pruning Made Easy, can be invaluable for providing additional visuals and answering questions you may have during the pruning process.
In addition to the survival benefits, pruning an apple tree stimulates stronger, more vigorous growth from the remaining buds. After a single growing season, an apple tree you prune will be bigger with stronger branching than a matching, unpruned apple tree.
Equally as important to the benefits above, your apple tree needs to be pruned to provide a strongly structured shape. The natural shape an apple tree takes on is not always the best for its maximum fruit production. Stark Bro’s apple trees are pruned in the nursery row for proper shaping to get you started and corrective pruning must continue at home. If you keep up with your pruning and shaping each year, it will be a reasonable task mostly involving small, easy-to-heal cuts.
Pruning angles
Narrow, V-shape crotch angles in the limbs are an open invitation to disastrous splitting later on, particularly when your apple tree is supporting a large fruit crop. For your tree’s branches, choose wide 10 o’clock and 2 o’clock angles.
Pruning to a bud
Make sharp, clean cuts close enough (about 1/4 inch away from the next outward-pointing bud) so you won’t leave a clumsy stub that’s hard to heal over. Stay far enough above the bud so it won’t die back. Slant the cuts and the new growth will develop beautifully.
Every branch has buds pointed in various directions. Since you want vigorous new growth to spread out and away from the center of the tree, make you cut above a bud that’s aimed outward. These are usually located on the underside of the branch. This helps your apple tree take on a more spreading shape, keeping it open to light and air circulation.
Apple trees develop better if they’re pruned in a timely manner and with a bit of care and consideration. Here’s how:
Help the tree form a strong framework. This is what you should aim for when pruning:
The purpose is to keep your apple tree’s canopy from becoming too thick and crowded, so some thinning is necessary to permit light to enter the tree and also to keep its height reasonable. All these objectives promote the improved bearing and fruit quality of your apple tree – you’ll be pleased with the results!
Prune apple trees to a “Central Leader” shape.
Apple trees are productive and strong when pruned and trained to a central leader (or main leader) structure. This type of structure has a pyramidal shape with a single upright leader limb as its highest point. This central leader is the newest extension of a long, upright growing trunk from which all lateral branches arise.
As with all strong-growing branches, the leader should be headed (pruned back) at approximately 24- to 30-inches above the highest set of its surrounding “scaffold” branches. The uppermost remaining bud on the leader will then produce a vigorous new leader, and no other shoot should be allowed to grow taller.
Lateral limbs should be selected from shoots growing out from the central leader. These should be spaced vertically about 4- to 6-inches apart. They should also have growth that is more horizontal than vertical, and point in different compass directions from the trunk – thus creating a “scaffold” of branches. Any unbranched lateral branches should be headed back to the next ideal bud to encourage side branches and to stiffen long, lateral branches. All laterals should exhibit the stronger wide angles discussed above.
Whips are unbranched trees. Unbranched apple trees are ideal if you want more control over which branches are allowed to develop – as you might in certain artful pruning styles like espalier. Prune whips back to 28- to 36-inches above the ground at planting time. After the new branches have grown 3- to 5-inches in length, select a shoot to become the leader and the rest become the tree’s scaffold limbs.
Sometimes pruning needs to be done even when the season isn’t ideal. If a branch is broken by the wind or by a heavy load of fruit, emergency treatment is necessary. When taking action due to injury, prune to clean up any ragged edges; making a smooth cut that leaves no stubby stump.
It does not benefit the apple tree to wait until dormancy to prune damaged, dead, or diseased limbs or to remove unwanted growth like suckers and watersprouts. Fast-growing tree suckers and watersprouts should be completely removed as soon as you see them.
You should not prune a spur-type apple tree as aggressively as you would a partial-tip or tip-bearing apple tree. Spur-bearing apple trees are naturally less vigorous than the others and do not require it. In apple trees with a spur-bearing habit, fruit develops on each limb and from the trunk out. They develop many small spurs rather than long shoots, so fewer should be removed. On the other hand, sometimes too many fruit spurs grow along a branch and may need to be thinned out to encourage bigger and better fruit on what remains.
There are several reasons to thin fruit:
Home gardeners are able to effectively thin apple trees by hand. During May and June in most areas, many apple trees will start to drop or abort underripe fruit. This is a natural process that allows the tree to mature the remaining crop load. If not corrected through thinning, apple trees may bear biennially (fruits only every other year) or bear heavily one year, then bear a comparatively light crop the next year. Thinning may seem counterproductive in theory, but it really is a benefit to your apple harvest in the end.
The best time to thin apple trees is within 20 to 40 days of full bloom. Thin so that each remaining apple is spaced 6 to 8 inches apart on the branch. In clusters, leave the king bloom (the center bloom in the cluster of five flowers) as it will develop into the largest fruit. On spur-type apple varieties, many fruit spurs grow along a branch and will need to be thinned out to encourage bigger and better fruit on what remains.
First and foremost, be sure to familiarize yourself with the existing or potential pest and diseases issues for apple trees in your area. Your local county Cooperative Extension is an excellent resource for this information. Documents for identification and control, assembled by your local state universities, may even already exist online. Your local independent garden centers and local growers are also invaluable sources of pest and disease control in your area.
In high-density areas, a proper and consistent spray schedule can be paramount to the survival of your apple tree. Many potential issues can be prevented with sprays before they become problematic. To get the most return on the investment of your time and energy, spraying apple trees should be done consistently and thoroughly following the guidelines below.
Before you begin, read and follow all instructions on the labels of the products you have in hand. Do not combine any chemicals unless the labels on each chemical spray involved specifically state that you can safely do so.
A well-rounded home spray program for apple trees includes dormant-season as well as growing-season sprays for pests and diseases. Research your location and learn about any pests or disease that are common in your area. If you know apple tree diseases are common in your area, consider planting easy-care, disease-resistant apple trees if possible.
Note: Contact your local county Cooperative Extension for alternative suggestions and advice on cultural and chemical control methods if certain sprays offered by Stark Bro’s are not recommended for use in your area.
*gives bees and other beneficials a chance to safely pollinate the blossoms
It bears repeating: Always follow instructions printed on container label for more detailed information, such as timing and application instructions specifically for apple trees.
Unless your apple trees are growing in an area where irrigation is usually needed for growth (desert areas, drought areas, containers, etc.), you probably won’t need to water your apple trees more than what the rain naturally provides after the first growing year. Until then, follow these guidelines to get your new apple trees off to a great start.
Note: These guidelines are far from strict, so just be sure to water as needed. Apple trees do not need lots of water every day; however, if you discover that your soil or your location’s environment require more frequent watering to avoid drought-stress to your apple trees, adjust your watering schedule accordingly. Pay attention to your apple trees and the soil they’re planted in as the best reference for when they need water.
Keep in mind, many parts of the country have restrictions on water usage. Be sure to adhere to your county or state’s restrictions when watering new apple trees, and contact your local department in charge of water usage for more information.
Are you ready to enjoy delicious homegrown fruit? Harvest is the time to enjoy the results of your hard work. Keep a few things in consideration as you reap the fruits of your labor: the best time to pick the fruit from your tree, and how to store the fruit.
Apple trees will start bearing fruit in 2-5 years under normal growing conditions with proper maintenance and care.
It’ll be best if you wait until just the right time to pick the fruit off your trees. Apples tell you they’re ripe by losing the last traces of their green background color and developing full, bright color. Most important, they become less tangy-tart and sweeter in taste. You’ll also notice the seeds turn from white to brown. When picking, just lift them upward quickly. If they’re ready, they will come loose without damage to the tree.
Harvest season for apple trees in most areas begins as early as July and can be as late as November on average, depending on the variety and location. Here is the annual average yield per apple tree:
Cool storage preserves apples for winter enjoyment. Fresh fruit is a special treat during the bleak winter months. Fortunately, many apple varieties keep their fine eating qualities for a long time, with proper storage. If you’re planning to store your apple harvest, pick them a bit early – just as they start to ripen. Handle the fruit carefully to avoid bruising that could develop into spoilage. Do not keep damaged or potentially infested fruit for storing, as they will break down quickly and negatively affect the integrity of the rest of your apple harvest.
The ideal storage environment is humid and cool, around 32ºF to 40ºF. You can place your apples in perforated plastic freezer bags and keep them in your refrigerator. Any cool area at home, like a basement, cellar, or unheated porch should also be fine for a while. Bring the apples out into room temperature when you’re ready to use them.
It’s best to inspect stored fruit every week or so to check for any spoilage. That way, you can remove any apples that are developing soft spots or brown areas. This also keeps spoilage from spreading to nearby fruit before it’s too late.