Strawberry Shortcake Coneflower Seeds Beautiful Summer Blooms Fresh This double coneflower starts cream white but as they age they take on a dark rose color. The ray petals stay that cream white color. Hummingbirds keep on coming to this one! Zones: 4-9 A bonus is the strong stems and long lasting, making it a great cut flower. Certainly different than others on the market and a must add. Mature Height: 32 inches Mature Width: 30 inches Bloom Size: 3.5" Form: Upright Seed starting instructions included.