When to dig itos?
I have a Bartzella, 4 bloom seasons old. In spite of the very abnormal weather, it has been beautiful, and blooms later than the rest of my peonies. Now I'm wondering if it needs to be dug and divided. the stems are packed together. also I don't know how much fertilizer to give it. It hasn't been fertilized since I dug the planting hole.I have heard itoh's need digging every 3 to 4 years, is this true?