Columbine (Aquilegia, Zones 3 to 9) You can find columbine in just about any shade, including popular bicolored blooms. Plant in sun or shade for spring to early-summer flowers. Grows 1 to 3 feet high and 6 to 24 inches wide. Why we love it: It’s a wonderful companion plant. Pair red-and-white columbine with blue pansies for an easy, early patriotic display.