What to Do in March, Southwest Rockies
Important Quote from the Linked Article:
It's time to prune most trees and shrubs, but don’t prune spring flowering shrubs such as forsythia, quince, spiraea, and lilacs until after they’ve blossomed, or they will not bloom this year. Finish pruning fruit trees before buds swell. In late March, cut back butterfly bushes (Buddleja) to within 6 inches of the ground. The shrubs will grow back and bear many more flowers than they would if they weren't pruned as drastically.