Spraying Fruit Trees

Nature Hills Nursery | February 14, 2026

One of the leading problems facing fruit trees is insects and other pests. They will infect the fruit with various diseases and often lay eggs inside. The best way to keep fruit plants free from pests is by spraying them. Spraying fruit trees not only rids them of pests, it may even help protect the fruit trees from diseases and fungus. The first step to spraying fruit trees is to get the proper equipment. Spraying fruit trees requires a sprayer, a garden hose, a mixing tub and the spray itself.

Most fruit tree sprays come in concentrated form, meaning that they will have to be diluted. The amount of dilution necessary will vary from spray to spray. Always read the provided instructions before mixing with water. Once the solution has been mixed with water, spraying fruit trees can begin. Attach the hose to the sprayer, and squeeze the trigger for a second or two. This will allow the mixture to reach the end of the hose. Spraying fruit trees should always be done according to the instructions provided with the spray. Some sprays require a heavier application than others, and this should be understood before spraying fruit trees. Spraying fruit trees is an important step in ensuring a full, healthy crop of fruit. Without a spray, the tree may become diseased, or the fruit can get infested.

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Frequently Asked Questions

What do you spray on fruit trees to control pests and disease?

Most fruit trees benefit from a concentrated fruit tree spray that targets both insects and fungal diseases in one application. These sprays are typically sold in concentrated form and must be diluted with water according to the label instructions before use. For best results, apply using a garden sprayer attached to a hose, and follow the timing and application rate specified on the product label to ensure thorough coverage of foliage and developing fruit.

When should I start spraying fruit trees in spring?

Begin spraying fruit trees in early spring before the buds begin to swell and open, typically when temperatures are consistently above 40 degrees Fahrenheit. This dormant stage is the ideal window to apply a dormant oil spray, which helps smother overwintering insects and eggs before they become active. Follow up with additional applications at the pink bud stage and again after petals fall to protect against fungal diseases and emerging pests. Always read your specific spray's label for exact timing and dilution rates, as application schedules can vary depending on your region and the type of fruit tree you are growing.

What should I spray on fruit trees during the dormant season?

During the dormant season, before buds begin to swell, apply a dormant oil spray (also called horticultural oil) to your fruit trees to smother overwintering insects, mite eggs, and scale. This is one of the most effective and low-impact treatments you can apply, and it works best when temperatures are consistently above freezing but the tree has not yet broken dormancy. Mix the concentrate according to label directions, as dilution ratios vary by product and target pest. Thoroughly coat all bark surfaces, branches, and crevices with the solution for the best results.

How often should I reapply fruit tree sprays after the first treatment?

Reapplication frequency depends on the specific spray product you are using, so always follow the label instructions closely. Most fruit tree sprays are applied on a schedule tied to the tree's growth stages, such as at bud break, petal fall, and every 10 to 14 days during the growing season when pest pressure is high. Check your product label for exact intervals and reapply after heavy rainfall, which can wash away the protective coating.

Should I spray fruit trees before bloom, during bloom, or after petal fall?

Most fruit tree spray programs begin in late dormancy before buds break, typically when temperatures are consistently above 40 degrees Fahrenheit, and then pause during bloom to protect pollinators. After petal fall is one of the most critical spray windows, as this is when many insects and fungal diseases become actively threatening to developing fruit. Always follow the specific timing instructions included with your chosen spray product, as application schedules vary depending on the pest or disease you are targeting.

How do I know if my fruit tree needs a fungicide, insecticide, or horticultural oil?

The type of spray your fruit tree needs depends on the problem you're observing. Discolored or spotted leaves, powdery coatings, or rotting fruit typically signal a fungal issue that calls for a fungicide, while visible insects, sticky residue, or chewed foliage point to an insecticide. Horticultural oil is best used as a dormant spray in late winter or early spring, before bud break, to smother overwintering insects and their eggs. Inspect your tree closely, identify the specific pest or disease present, and choose a spray labeled for that problem, always following the product instructions for mixing and application rates.

Can I mix different fruit tree sprays together in the same sprayer?

Mixing different fruit tree sprays together is generally not recommended, as combining chemicals can reduce their effectiveness or even create harmful reactions. Each spray is formulated with specific active ingredients and carrier agents that may be incompatible with other products. Always use a clean sprayer for each individual spray, and thoroughly rinse your equipment between applications to avoid cross-contamination and ensure each product performs as intended.

How do I spray fruit trees safely without harming bees and pollinators?

To protect bees and pollinators when spraying fruit trees, always apply sprays in the early morning or evening when bees are least active and flowers are closed. Avoid spraying during bloom time entirely, as this is when pollinators are most vulnerable and most essential to your fruit set. Choose pollinator-safe spray formulations when possible, and always read the product label carefully before mixing and applying. Time your spray schedule around petal fall rather than during open bloom to keep your orchard both productive and pollinator-friendly.

How should I adjust my spraying approach for young or dwarf fruit trees versus mature trees?

Young and dwarf fruit trees require a lighter, more targeted application than mature trees, as their smaller canopy and developing bark are more sensitive to chemical concentration. For trees under three years old or under 8 feet tall, reduce your spray concentration to the lower end of the label's recommended range and focus coverage on new growth, branch crotches, and the undersides of leaves where pests tend to shelter. Mature trees with larger canopies need thorough, even saturation from the base of the trunk up through the outermost branches to be effective. Always calibrate your sprayer pressure and dilution rate based on tree size before you begin, and reread the product label each season as your tree grows into a new size category.

How do I create a seasonal spray schedule for fruit trees?

Creating a seasonal spray schedule for fruit trees typically begins in late winter or early spring, just before bud swell, with a dormant oil spray to smother overwintering insects and eggs. As the season progresses, apply fungicide sprays during bloom and follow up with insecticide treatments after petal fall, repeating every 10 to 14 days through mid-summer depending on pest pressure in your region. Always read your spray product's label carefully for dilution ratios and reapplication intervals, then keep a simple garden journal to track spray dates and adjust your schedule based on what you observe each season.