Butterfly Bushes and Willow Trees

Dead branches on a butterfly bush need to be pruned to keep the plant looking its best.

Lilacs will bloom in different climates. Sisika/Shutterstock

Q: How and when do I trim my butterfly bush?

A: There are several species of plants commonly called butterfly bush. The most common ones are in the Buddleia genus. The most common one is Buddleia davidii, and it is also sometimes called summer lilac.