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Insight Horizon Media

When should I Spray dormant oil on my fruit trees?

Author

Daniel Johnson

Published Feb 09, 2026

When should I Spray dormant oil on my fruit trees?

Dormant oils should be applied in late March or early April before the plants show signs of breaking dormancy (before “bud break”). Dormant oils applied in February or early March are not effective as insects are not actively respiring at this time and, therefore, are not vulnerable to the oil’s suffocating effects.

How do you make dormant oil spray for fruit trees?

Mix together 1 tablespoon of canola oil, a few drops of laundry detergent and a quart of water. Shake well and pour the mixture into a spray bottle when you are ready to use it. This mixture controls insects by smothering the insects, so make sure to use an adequate amount when applying it to your fruit trees.

Should I spray peach trees with dormant oil?

Dormant oil can be applied at any time during a tree’s dormancy — from just after leaf drop in fall to just before bud break in late winter. After buds begin to swell in spring, and especially after green leaf tips emerge, it’s too late to spray or you’ll risk injury to trees.

How late can you Spray dormant oil?

Dormant oils should not be applied until a tree has gone completely dormant, but also before new growth occurs. Applications in late fall or early spring are ideal when temperatures are above freezing (over 40 degrees F is ideal), but also below 70 degrees F.

Can you spray fruit trees when in bloom?

Avoid spraying fruit trees while flowers are open, since insecticides sprayed at that time kill bees and other pollinators. Read and follow all safety precautions to minimize personal exposure to pesticides. Always follow mixing instructions.

Is it too late to spray apple trees?

If sprays are applied too late, the pests enter and eat inside the fruit where they are protected from sprays. If applied too early, the spray will dissipate and be ineffective when the insects attack. So if you have an apple, pear, or cherry tree, be ready to spray your trees within the next few weeks.

What is the best dormant spray for fruit trees?

Superior oil, also called horticultural oil, is a highly refined miscible oil (up to 99.9 percent pure) that when mixed with water and sprayed on trees will smother overwintering insects and their eggs. It targets mites, aphids, leaf hoppers, mealy bugs, leaf miners and more.

How much water do you mix with dormant oil?

What dosage of Dormant Spray Oil should I use with hose end sprayer? Per the Dormant Oil product label: Ornamentals: 3 tablespoons (1.5 oz.) per gallon of water, Fruit Trees: 6 tablespoons (3 oz.) per gallon of water.

Is it too late to spray peach trees?

After most petals have dropped: (Also known as petal fall or shuck) Spray peach trees with a copper fungicide, or use a combination spray that controls both pests and diseases. Wait until at least 90 percent or more of the petals have dropped; spraying earlier may kill honeybees and other beneficial pollinators.

What happens if you spray dormant oil too late?

For the most effective results, it is preferable to wait until the daytime temperature reaches 12-15 oC three to four days in a row. Applying too soon will not produce satisfactory results. However, applying too late (when the buds have started opening or are already open) may cause damage.

When Should I spray my fruit trees?

Use dormant sprays in late winter to kill overwintering insect pests on fruit trees. Apply dormant oil in late winter or early spring if there was intense pest pressure during the previous growing season. This treatment normally goes on every three to five years.

What can I spray on my fruit trees naturally?

Basic liquid vegetable or canola oil is a key element in a homemade pesticide for your fruit trees. Vegetable or canola oil works by suffocating small insects, insect larvae and eggs, thus preventing infestation. One cup of vegetable or canola oil is mixed in one gallon of water.

When to apply Dormant oil spray?

Dormant oils should be applied to trees and shrubs while they are still in the dormant state, usually late winter or very early spring. It is best to apply the dormant oil before the trees and shrubs begin to bud. Spraying dormant oil after budding has occurred will still protect against insects but may kill or damage small leaves or young buds.

What is the best fruit tree spray?

Bonide (BND217) Citrus,Fruit and Nut Orchard Spray,Insecticide Concentrate.

  • BioAdvanced 12 Month Tree and Shrub Protect and Feed Concentrate.
  • Monterey LG6150 Garden Insect Spray,Insecticide&Pesticide Concentrate.
  • Bonide Products 202 Fruit Tree Spray.
  • Ortho Flower,Fruit and Vegetable Insecticide Concentrate.
  • What does dormant spray do?

    Dormant oil spray is a horticultural spray that is used on wood plants, such as fruit trees, as a pest preventative. Dormant refers to the time of year that it is applied more than the actual type of spray. The spray is used to prevent pests and disease during the growing season. Dormant oil is available as both organic and nonorganic treatments.

    What is dormant tree oil?

    Dormant oil is a refined petroleum product formulated for orchard tree use. It has been in use for well over a century in commercial orchards, and is still regularly used today. It is classified as an insecticide, and acts by coating over-wintering insects hiding in tree trunk and limb bark with a suffocating layer of oil.