When is the appropriate time to spray for cottony camellia scale on my holly tree?
Can I spray my holly in summer - above 80 degrees? I live in Arlington Va.
Certified GKH Gardening Expert
This would depend on what you will be spraying with. Dormant oil will need to be sprayed during dormancy. Just about anything else will need to be sprayed during very early morning, or on a cloudy day. It is best that it isn't hot, as this can cause a plant to react negatively to sprays.