How to Cut Back Sedum Spring, after the last frost, is the most important time to cut back sedum. Prune the sedum again in early summer and clean it up a final time in the fall. Rake out debris ...

Sedum begins to die after the first frost, but it's up to you if you want to prune it back or leave it. The flowers remain colorful, and the seeds attract birds to your yard throughout the winter ...