Survey your garden and try to imagine it in spring and summer, and identify dead spots and relocate new perennial divisions to those.
Many of us in the Midwest are planting even more peonies than ever. These easy-care plants do have some problems. One is buds that never develop into blooms.
In the Midwest, May is the month when our bearded iris bloom, and they are often combined in beds with the multi-petaled peony, another May-flowering perennial.
One of the most gorgeous shrubs that can be planted late is the tree peony.