Late February / March is the time to spray roses and other trees and shrubs with a dormant oil spray, particularly if the trees or shrubs had hemlock woolly adelgid, pine bark adelgid, euonymous scale, spruce mites or other pests in the past year. Wait to apply the spray until the temperature is above 40 degrees and there is no rain in the immediate forecast.
January and February are the best months for pruning many deciduous trees and shrubs. Remove suckers, crossing and rubbing branches, taking care to avoid injuring the branch collar. For more pruning resources, you can visit our general post on pruning trees and shrubs, or our post on pruning tools.
Heather, witchhazel, winterhazel and paperbush bloom this month.
