When should I prune back mums? Thanks.
Cutting Back Mums
Certified GKH Gardening Expert
Usually, these plants are cut back in the fall following a few frosts. Stems of the mums are pruned back to 3-4 inches above the ground. New growth appears from this in spring. If you were not able to cut the plant back in fall, you can do so now if there is still old, dead growth present. I would not trim off the new green growth.