Apples are one of the most recognizable tree fruits for home gardeners. With proper cultivar selection and careful management, apple trees can produce high-quality fruit for many years. However, successful production requires attention to site, planting, pruning, and pest management.
Site Selection | Types & Cultivar Recommendations | Planting | Care & Maintenance | Harvest & Storage | Pruning & Training | Propagation | Potential Problems | More Information
Site Selection
Site selection is important for the long-term health and productivity of trees. Apple trees are a long-term investment, so time spent before planting, understanding the site conditions, and making adjustments is time well spent
Light
Apple trees perform best in full sun, receiving direct sunlight for most of the day. Shaded sites reduce fruit quality and increase disease problems.
Location
Good air drainage is also critical. Avoid low areas where cold air settles, as these areas are more prone to late-spring frosts that can damage blossoms. Select a slightly elevated location where cold air can drain away.
Avoid immediately replanting a site with apples or a closely related crop, such as pears, following the loss or removal of plants due to low productivity. By immediately replanting such sites, there is a greater risk of encountering soilborne diseases (Phytophthora and Verticillium species), viruses, and other issues. Because soilborne diseases have a wide host range and can remain dormant in the soil for several years, cultivars that are resistant to these diseases should be considered when replanting.
Soil
Soil drainage is equally important. Apples do not tolerate wet soils. Choose a site with well-drained loam soil whenever possible. Poor drainage increases the risk of root diseases such as Phytophthora. If poor soil drainage is caused by a shallow clay layer, as often occurs during home construction, you may be able to deep-till the soil to break it up. Learn how to conduct a soil drainage test in this article: Testing and Improving Soil Drainage.
Before planting, conduct a soil test and adjust pH and fertility as needed. Tree fruits perform best in soils with a pH of 6.5 to 7.0. If the soil pH is not ideal, it is highly beneficial to take steps to adjust it before planting. Learn more in this article: How To Change Your Soil's pH.
Types & Recommended Cultivars
Select cultivars that are winter hardy and adapted to Iowa conditions. While flavor, color, and use are also important factors in selecting an apple variety for your yard, disease resistance and pollination are primary considerations.
Learn more in this article: Apple Varieties and Their Uses.
Disease Resistance
Disease resistance is an important consideration for home gardeners who wish to minimize inputs and pesticide use. Apples are prone to many diseases, so selecting cultivars that are disease-resistant is highly preferable for home plantings.
Recommended cultivars based on disease resistance include:
- LIberty
- GoldRush
- Freedom
- RubyRush
- Dayton
More options and information about each can be found in this article: What are some disease-resistant apple cultivars to grow in Iowa?
When shopping for apple trees, several cultivars are readily found in garden centers and have familiar-sounding names, but are highly susceptible to common apple diseases. Because they require frequent fungicide applications to produce a high-quality crop, they are not recommended for home gardens. These varieties include:
- Cortland
- Fuji
- Gala
- Golden Delicious
- Granny Smith
- Honeycrisp
- Jonathan
Pollination Requirements
Apples are self-unfruitful crops. This means they will not set fruit with pollen from the same plant and require pollen from another cultivar of the same species or closely related species (cross-pollination) to set fruit.
You need to select at least two cultivars that bloom at the same time to get good fruit set on apples. A select few cultivars, such as Jonagold, have sterile pollen. If sterile cultivars are desired, a minimum of three different cultivars must be planted: the first one being the sterile cultivar, a second one to pollinate the sterile one, and a third one to pollinate the second cultivar, since the sterile cultivar cannot return the favor for the second tree.
Apple cultivars can be classified into early-, mid-, and late-season bloomers. The bloom periods of mid-season bloomers overlap with those of early and late bloomers, allowing adequate cross-pollination and fruit set. However, the bloom periods of early- and late-blooming varieties often do not overlap, resulting in poor pollination. Most flowering crabapples will pollinate nearby apple trees if they bloom at the same time.
Learn more in this article: Pollination Requirements for Tree and Small Fruits.
Spur-Type Apple Trees
Spur-type apple trees are defined by how they produce fruit. These trees bear apples on short, compact shoots called spurs that form along the branches on two-year-old or older growth and can produce flowers and fruit for several years. This distributes fruit along the limbs rather than only at the ends. Spur-type trees tend to have a more compact growth habit, fewer long lateral shoots, and earlier fruiting than standard types. This growth pattern allows for consistent production and makes pruning easier, as gardeners can retain productive spur wood while removing excess vegetative growth.
Rootstocks
Nearly all apple trees are grafted. With grafted trees, a desirable cultivar is grafted to a rootstock to provide several benefits. Many apple rootstocks have a dwarfing effect on the tree. Smaller trees are easier to take care of in terms of pruning, spraying, and harvesting. They also reach fruit-bearing age much sooner and produce trees that fit better in the typical home landscape. For these reasons, trees grafted to dwarf and semi-dwarf rootstocks are preferred.
Apple trees grafted to dwarf rootstocks will grow to approximately 8-10 feet tall, depending on cultivar, and often require support. Semi-dwarf rootstocks produce trees about 15 feet tall. The vigor of the cultivar affects the ultimate size of the tree. Good rootstock and cultivar pairings balance the dwarfing potential of the rootstock with the cultivar's vigor, avoiding trees that are either too small or too large. Trees not grafted to dwarf or semi-dwarf rootstocks (known as seedling rootstocks) will reach 25 to 30 feet tall and wide.
Common rootstocks found and often recommended for use in Iowa include EMLA 7 (semi-dwarf), B9 (dwarf), and G41 (dwarf). M26 (dwarf) is also common but is highly prone to fire blight, making it less desirable. Information on dwarf and semi-dwarf rootstock types and their attributes can be found in this article from the University of Washington: Rootstocks for Apple.
Some specialty nurseries will custom graft trees with the desired cultivar on the desired rootstock, giving you a tree that fits all your needs. Often, however, the gardener is left to compromise on apple variety or rootstock type, especially when shopping at a garden center or big-box store.
Planting
Plant apple trees in early spring once the soil is workable and the risk of severe freezing temperatures has passed.
For the home gardener, trees are often available as bare root or container-grown. Bare root trees are common from mail-order nurseries. They tend to be less expensive, and mail-order sources have a wider range of options, allowing you to get the cultivar you want. Container-grown trees are common from garden centers or big box stores. They are easy to manage and plant, but you often have very little selection when it comes to cultivar or rootstock.
Select high-quality nursery stock. One- or two-year-old trees with a strong central leader establish well and begin bearing sooner.
Apple trees on a dwarf rootstock can be spaced 8 to 12 feet apart, those on a semi-dwarf rootstock can be spaced 10 to 16 feet apart, while those on a standard (non-dwarfing or seedling) rootstock will need to be spaced 18 to 24 feet apart.
Apple trees can be planted in the same manner as other trees in the landscape. Learn more in these articles: Tree Planting Basics and How to Plant Bare Root Trees.
Care & Maintenance
Watering
Newly planted trees require frequent irrigation because roots are confined to the original root ball. Check for water needs frequently during the first growing season. Start with 3 to 4 times per week and as the growing season progresses, reduce frequency to weekly. Keep the root zone evenly moist, and apply water slowly to soak the soil to a depth of 12 to 18 inches. Continue supplemental watering as needed during dry periods for an additional one to two years to support root establishment.
Established apple trees rely more on rainfall but still need water during extended dry periods. Trees do best when about 1 inch of water is applied per week from rain or irrigation. If conditions are dry and watering is needed, water deeply and infrequently to encourage strong root systems, and allow the soil surface to dry between applications.
Fertilizing
Check tree growth to determine whether fruit trees need fertilization. Nonbearing fruit trees should grow approximately 15 to 30 inches per year. Bearing trees should produce 8 to 15 inches of new growth. (The actual amount of new growth will vary due to differences in varietal vigor.)
It is generally not necessary to fertilize apple trees, as most Iowa soils provide the nutrients needed for adequate growth. If the lawn in the vicinity of the fruit trees is fertilized on a regular basis, there should be no need to fertilize the trees. The fruit tree roots will absorb nutrients from the lawn fertilizer. Additional fertilizer may be excessive.
Apple trees with less-than-desirable growth may need fertilization applied in early spring, starting just before budbreak and completed by petal drop. Always err on the side of less when it comes to fertilizer. Too much fertilizer produces excessive vegetative growth and inhibits fruiting.
Learn more in this article: Fertilizing Tree and Small Fruits in the Home Garden
Weeding
Maintain a weed-free area around the tree to reduce competition for water and nutrients. Mulching can help conserve soil moisture and prevent weed germination. Learn more in this article: How can mulches be used to control weeds?.
Thinning
Apple trees often set more fruit than they can support. Thinning is necessary to obtain large, high-quality fruit at harvest, prevent limb breakage, and reduce biennial bearing.
Hand thinning of apples should be done within 6 weeks of full bloom. Leave the largest apple in a cluster unless it is damaged. After thinning, apples should be spaced about 8 to 10 inches apart on the branches.
Learn more in this article: Alternate Bearing, Fruit Drop, and Hand Thinning of Tree Fruits.
Staking
Many apple trees benefit from staking for the first two to three years in the garden. Install a sturdy stake or post at planting, placing it just outside the root ball and securing the trunk with a soft, flexible tie. Allow slight movement to promote trunk strength, but keep the tree upright and stable. Maintain ties and adjust them as the tree grows to prevent rubbing or girdling.
Dwarf and some semi-dwarf apple trees often require permanent support because dwarfing rootstocks produce smaller, less anchoring root systems. These trees benefit from being staked or attached to a support system for the life of the tree to prevent leaning or uprooting under wind or fruit load.
Spraying
Apples are susceptible to a number of serious insect pests and diseases. While there are several strategies that can be used to reduce or avoid spraying, such as planting disease resistant culitvars, most trees will need some type of spray to manage insect and disease issues and get high-quality fruit.
For many home gardeners, a home orchard spray is the most straightforward management option. These mixtures typically contain one or more insecticides and fungicides formulated to control common apple pest insects and diseases. These combination sprays are available in organic and non-organic options and simplify spraying. Proper timing of applications is essential for managing pest and disease issues and the label on a home orchard spray clearly provides the exact schedule to follow.
Learn more in this article: Spray Schedule for Home Apple Trees.
Harvest & Storage
Harvest timing depends on cultivar. Apples are ready for harvest when they are firm, crisp, juicy, well-colored, and have developed the cultivar's characteristic flavor. The seeds will be brown and the fruit should release easily with a gentle upward twist.
Handle fruit carefully to avoid bruising and store it in cool conditions to extend its shelf life.
Learn more in this article: How to Harvest and Store Apples.
Pruning & Training
Regular pruning is essential for maintaining tree structure, fruit quality, and productivity. Prune annually during late winter while trees are dormant.
Train trees to a central leader system with well-spaced scaffold branches. Remove dead, diseased, and crossing branches. Thin the canopy to improve light penetration and air movement.
Proper pruning helps balance vegetative growth and fruiting. Excessive pruning encourages vigorous growth and can reduce yields, while insufficient pruning leads to poor fruit quality.
Learn more in this article: Pruning Apple Trees
Espalier
Espalier is a method of training apple trees to grow flat against a wall, fence, or trellis, making efficient use of limited space in the home garden. This pruning and training system creates a two-dimensional tree through careful branch positioning and repeated pruning. Apple trees are well suited to this practice, especially spur-bearing and dwarf selections, because they adapt to frequent pruning and produce fruit on short shoots along trained branches.
Install a sturdy support system at planting and begin training with a young tree, tying flexible shoots to horizontal wires to form a planned pattern. Espalier requires consistent pruning and training to maintain shape and productivity.
Learn more in these articles: Espalier from the University of Wisconsin and Espalier an Apple Tree from the Chicago Botanic Garden.
Propagation
The preferred method of propagation for apple trees is by grafting. Nearly all apple trees sold in nurseries and garden centers are grafted. Grafting allows the gardener to create a new tree that is genetically identical to the parent tree. Grafted plants begin fruiting sooner, and with careful selection of rootstocks, they can change the tree's size, making it smaller and easier to manage. Learn more in this article: Whip and Tongue Grafting of Apple Trees.
When grown from a seed, apple trees will not produce apples with the exact same fruit characteristics, such as taste, size, and color. In nearly all cases, the apple tree that develops will be inferior to the named cultivar from which it was grown. However, growing an apple from seed can be a fun project. Learn more in this article: Can I grow an apple tree from a seed?
Potential Problems
Apple trees are highly susceptible to insects, diseases, and environmental stress, so even small plantings need regular monitoring, pruning, and timely care to produce usable fruit.
Expect challenges each season. Pests, diseases, weather, and physiological disorders can all affect flowering, fruit set, and quality. Resistant cultivars and good cultural practices reduce some problems, but many require ongoing attention. Understanding these issues helps gardeners maintain healthy, productive trees.
Learn more in this article: Diseases, Pests, and Disorders of Apple Trees in Home Gardens.