Plant at soil level, about 24 in. Usually blooms first year after planting. Plants bloom in late spring. Use balanced fertilizer after bloom. Sword-like foliage is attractive spring and fall.
Clumps get bigger each year.
Easy to grow, divide clumps every three or four years and replant. A long-lived perennial. Grow in full sun. Plant 5 in. Once planted, leave undisturbed.