McKana Giant Columbine Seeds grow beautiful blooms in radiant hues of red, white, yellow, and purple. McKana Giant Columbine Seed Mix will liven up any garden, meadow, or flowerbed; plus, they make a lovely bouquet! McKana Giant Columbines stand 60-90 cm high and produce buttercup shaped flowers that are 10-15 cm across. Elite gardeners chose McKana Giants! It’s easy to overcrowd these plants when they’re small, use annual flowers to fill in between your giant columbine plants until they are fully grown. Ideal spacing is 45-60 cm apart.