Iris siberica is a clump-forming perennial with tall flowers from late spring to early summer. Each sturdy stem produces about five blooms, above the foliage of sword-like leaves, this is a yellow and white variety called 'Butter and Sugar'. You can buy one to four established plants with this order, ready to plant in your garden at any time of year. Just dig a little hole, put the root-ball in, back-fill the soil around it then firm down and water well.

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