Aquilegia caerulea McKana Giants Mix Columbine is a perennial cutting garden darling that produces a spectacular rainbow array of bi-color 3" to 3.5" inch star shaped flower blossoms with stately spurs on the backside of the blooms. This showy cut flower production crop features 24" to 36" inch plants that produce an abundance of these gorgeous flowers on straight sturdy stems from spring through early summer. A celebrated garden delight, McKana Giants Columbine is a 1955 All-America Selections Winner. They are a particular favorite of hummingbirds and other friendly pollinators. Requires cold stratification. Cold hardy to zone 3. Packet: 50 seeds.