Set plants 6 to 8 inches apart. Choose a warm, sunny location where the soil is well drained. The corms should be planted 2 inches deep.
As they grow, old corms remain attached to new corms above. The plants do not spread this way; instead they spread through the formation of rhziomes-i.e., in two years there will be 3 or 4 plants where originally there was one.
Corms thus should not be divided. We recommend a heavy winter mulch, particularly in the northern portion of their range. Plants should not be subjected to intense summer heat and drought. In areas with hot summers, light afternoon shading and supplemental watering is advantageous.
Zones 5 (with protection)-8