Regular pruning helps wallflowers to thrive. They should be cut back once they have finished blooming, or in the early spring. Prune them so there is only a couple of inches left above the soil, and they will reward you with dense new growth once temperatures warm up again.

When should you prune Wallflowers?

Cut the entire plant back by half its height in late summer when blooming decreases to spur a new flush of blooms. Cut back flowers after the last wave of blooms in late fall to early winter to avoid the plant setting seed. The blooms can be left to go to seed if you want new seedlings in the spring.

Should Wallflowers be cut back?

Wallflowers can be cut back after blooming, or you can wait until the end of winter or very early spring. Cut them to nearly the ground, and the plant will reward you with a new flush of growth when temperatures warm up. These prolific plants bloom so hard and full for the entire season that they soon fade away.