Plants such as Dame's rocket, Lamb's ears, Delphinium, and Larkspur are some of the plants that flower in summer. In fall, grow plants such as Ornamental onion, Asiatic lily, Worm wood, Purple cornflower, Siberian iris, and Creeping phlox. Tulips, Pansies, Daffodils, and Poppies would bloom well in spring.