When can I divide daylilies?
Daylilies can be divided in early spring (as new growth begins to emerge) or in late summer. Dig up the entire clump with a spade. Shake or wash off the soil. Then carefully pull the clump apart. Oftentimes, a sharp knife is necessary to divide large, dense clumps. Each division should have 2 or 3 fans of leaves and a good root system. When dividing daylilies in late summer, cut the foliage back to a height of 6 to 8 inches.
Replant the divisions as soon as possible. When planting, the daylily’s crown (the area where the shoots and roots meet) should be approximately 1 inch below the soil surface. Water thoroughly. Divided plants usually don’t bloom well for 1 or 2 years.