My perennials are getting sparse in the center. What is wrong?
They need dividing most likely. They are getting too dense (think black hole) for anything to grow in the center. It is time to divide them. Do this in early spring or late fall after you have cut back. Simply dig up the entire plant and cut with a sharp tool into 2-4 sections and replant. Plant using good compost and mulch well. If doing in spring, water well for several weeks.
