Planted some Midnight butterfly bushes and they have been blooming since they were put in, but I know nothing about trimming these plants. All the blooms are now dead but the plants are still green; and with freezing weather coming, I am lost as what to do with them.
Midnight Butterfly Bushes
Certified GKH Gardening Expert
You can normally deadhead the shrubs without any ill effects; however, with winter weather on its way, it may be better to leave it until spring, as the dead flower growth may actually provide some winter protection. This article should help you with pruning a butterfly bush: https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/butterfly-bush-pruning-how-to-prune-a-butterfly-bush.htm