ok, i have a raised bed at my parents house. it is a 8" diameter circle. when i built this i wanted a tulip bed. the problem i realized is tulips and daffodils only bloom in the spring. what can i plant there that will come later. there are alot of daffodils on the yard so i would like a mixture of spring bulbs but i would like that to be followed by something else. periennal perhaps? i have a bunch of blackeyed susan seeds that i think would look nice there. is this a good idea? is there another flower that will compliment the blackeyed susans in terms of size that i can plant in the same area? i built the bed around a 7" tall weeping cherry tree. and would like a nice multiseasonal bed that will come back year after year.