The weight of ice and snow on these overgrown branches could cause them to break, distorting the look and health of the plant. Better to prune now. Also cut out any rubbing branches, dead wood or broken branches. As a general rule, do not prune more than one third of the plant at any one season. A lot of your clippings from your evergreens can be brought indoors and used for natural holiday decorations.
Late winter is a busy time for a gardener.
Along with many other preparation tasks, this is the time to prune most of the plants in your landscape. Once you can get into the garden without destroying the soil, trim up your ornamental grasses. Cut back the dry plumes to about four inches above the ground. You want to do this now before the plants start their spring growth. You can also trim up your other perennials.