One of the most well-known perennials in gardens are peonies. They come in a variety of shapes, colors and sizes, and grow best in cooler climates that have nutrient rich soil in a good drainage area. Peonies are easy to care for and prune.
Prune peonies in the spring and summer very lightly to improve air circulation. For serious pruning, prune them only in the fall when the foliage has begun to die back.
Use the pruning scissors to cut off any broken or weak peony stems (this means stems that are thinner or shorter than a ballpoint pen). Cut these stems back to the point where they connect to the base of the plant.
Prune slowly and carefully, because you want the peonies to be shapely and still stay bushy without trimming too much leaf mass off.
Prune the entire plant back to the ground if it seems diseased or dead in any way.