when is the best time to separate daylilies
Steps. 1  1. Divide daylilies (also known as Day Lily) any time from early spring to the middle of fall. The very best time to divide daylilies is late summer after they have finished blooming. 2  2. Prepare the spot where you will plant the new divisions. Loosen the soil and dig a hole deep enough to cover the base of the new clumps.