When separated from the clump, each division is ready to plant. Culture Iris require the same good cultural care as other perennials. Eliminate competition from weeds and grasses. Frequent shallow cultivation can help reduce weeds and will provide air circulation around the rhizomes, especially before blooming. Take care during cultivation to avoid injuring the rhizomes or the roots.
Herbicides are now available to control grasses in iris beds.
Small iris clump showing proper division for replanting. The central portion should be discarded. Iris need adequate water. Keep the soil moist, but not wet, before blooming time. When the blooms fade, cut them from the plant, unless obtaining seeds is a goal.