Complete info about it can be read here. Similarly one may ask, how late can you apply dormant oil?
Timing is everything. Dormant oils should not be applied until a tree has gone completely dormant, but also before new growth occurs. Applications in late winter or early spring are ideal, when temperatures are above freezing (over 40 degrees is ideal), but also below 70 degrees.
Additionally, what is dormant oil for trees? Dormant oil consists of refined petroleum oil that -- when applied to trees -- will smother overwintering insects -- such as aphids, scales and mites -- and their eggs or will dissolve their protective waxing coating. It is applied in the winter months when fruit trees are in their inactive period.
Keeping this in consideration, when can I use dormant oil spray?
Late winter and early spring, when the temperatures are barely above freezing, is the time to apply the best preventative for scale and mites: dormant oil. Dormant oil sprays are used on fruit trees before the buds begin to swell and suffocate insects and their eggs nesting in branches.
Is Dormant oil safe for bees?
Horticultural oils can be used to control aphids on roses. Not only do oils leave no toxic residues, they are safe to use around people, pets, and wildlife; have low impact on beneficial insects; and won't harm honey bees unless applied directly to flowers during the time of day that bees are foraging.
