A simple trick to remember is to plant short-lived plants between slower-growing, long-lived plants. A good example is peonies, this plant has a matured spread of about three feet, it may take seven years for them to reach this matured size. By interplanting with a plant like the Shasta daisies,which is a fast-growing, short-lived plant, will provide a full garden, with plenty of flowers while the peonies get fully established.
perennial flowers