200+ columbine mckana giants flower seeds, perennial, aquilegia caerulea, colorful, attracts bees and hummingbirds! from usa harley seeds (aquilegia caerulea mix) highly attractive to hummingbirds and butterflies, this easy-to-grow columbine seed mix is a wonderful addition to the summer border. growing readily from columbine flower seed, this columbine mix features large, 4 inch flowers. the foliage is also very special with its fancy-lobed, dusky blue-green leaves. mckana giant columbine seeds grow beautiful blooms in radiant hues of red, blue, white, yellow and purple. mckana giant columbine seed mix will liven up any garden, meadow or flowerbed; plus, they make a lovely bouquet! elite gardeners chose mckana giants! keep the seeds cool and moist for 3-4 weeks to dramatically improve germination rates. blooms second spring from seed. *** how to grow: plant in fertile, moist, well-drained soil and full sun or partial shade; this flower appreciates being shielded from the midday sun. mature plants tolerate some dryness, but should be watered in the heat of summer. hot and humid weather may cause the plant to wilt, since this plant prefers cool weather and can survive light frosts. flowers planted from seed will bloom in their second year of growth. after blooming, the foliage will die off. established plants can be divided, though they will self sow readily; volunteer plants can easily be transplanted. its natural growth in rocky areas makes it a good choice for rock gardens. *** **soil temperature for germination: 70f **sowing rate: 3 - 4 seeds per plant. **plant spacing: 12-15 inches. **hardiness: zones 3-10. **sun requirement: full sun. **days to germination: 21-28 days. **germination rate: 95%.