What is dormant oil spray?

Dormant oil spray is a type of horticultural oil that can be used to pests on plants. The spray is used when the plant is dormant, to keep it protected while it is not actively growing (usually over the winter months).

How does it work?

Dormant oil spray works by smothering and suffocating pests and it disrupts reproduction. It is made from refined mineral oil and contains emulsifiers to ensure it spreads evenly over the surface of the plant when applied. It is very effective on a wide range of pests including aphids and mites. Dormant oil spray is also effective against fungi such as powdery mildew. It’s considered a safe and effective way to control pests and diseases on fruit trees, shrubs, and other plants.

How to use dormant oil spray

Choose a time to apply the oil. It should be while the plant is not actively growing and the temperature should be above freezing. Next, mix the dormant oil spray according to the instructions on the package. Avoid skin contact with the oil by wearing gloves, long pants, and a long sleeved shirt. Apply the dormant oil spray thoroughly and evenly with a sprayer. Spray the undersides of the leaves and crevices in the branches. Check for any missed spots and apply more if needed. Wash clothing and hands thoroughly after application.

Dormant oil spray is very effective when used properly. You must follow the directions on the packaging to ensure best results. Overuse or improper use can cause damage to the plants.