First, know hydrangeas do not have to be pruned — unless the shrub has grown too large for its space or unruly and needs a little shaping up. Otherwise, you can simply clean up the plant by removing dead branches and deadheading spent blooms.

Should I cut off dead hydrangea blooms?

You should deadhead throughout the blooming season to keep your hydrangeas looking their beast and encourage new flower growth. However, stop deadheading hydrangea shrubs in mid to late fall, leaving any spent blooms in place.

Does cutting hydrangea blooms encourage more blooms?

Dull flowers can make your plant look blah, but pruning them away will allow for new growth. When you cut away old blooms, you encourage your plant to produce more blooms.