Secret Joy Coneflower Seeds Beautiful Summer Blooms Fresh For us the transition to a double flower is just as pretty as the flowers they become. Hummingbirds keep on coming to this one! Zones: 4-9 Great fragrance and strong stems for good cut flowers. Height: 24 inches Width: 28 inches Bloom Color: Pale Yellow, Double Bloom Size: 3 inches Seed starting instructions included.