Dormant oil sprays are applied on warm, windless days during the winter to trees and shrubs after they are pruned. That’s when insects susceptible to these sprays are most vulnerable.

Dormant oil applications are not appropriate on citrus or avocado trees as these species don’t enter a winter dormancy. When mixing up spray solutions, mix less than you think you’ll need, as ...

Most of us are accustomed to changing the oil in our cars and even oiling various pieces of mechanical equipment around the home. Ironically, ``oiling'' our trees and other woody plants is still a ...

Once leaves are open, dormant oil sprays still can be used but in far more dilute solutions. To be safe and to ensure efficacy, always read the directions on any spray and follow them carefully.

Maybe gardeners aren’t busy in Minnesota or Iowa during the winter, but for gardeners living in the Mojave Desert, it is probably our busiest time of year. I’m asked about spraying dormant ...

Q: When is it too late to use a dormant oil spray? I have a couple of apple trees. Can I use this dormant oil spray on other trees like my maples and my evergreens? If I mix up too much, I want to ...

Dormant oil spray must be applied before the leaves or flowers show themselves and when temperatures are in the 40s or above with no rain for 24 hours. Minimally, two and ideally three applications ...

The Garden will be applying dormant oil spray to many magnolias this spring. There is another window to treat for magnolia scale in late August, when the eggs hatch as crawlers.

A: I don’t have any in my pharmacopoeia at the moment, so I can’t read a label to see what plants are listed as ones to NOT spray with a dormant oil, but I do think that applying a dormant oil ...