Multiplying is one of the things that daylilies do very well. A very hardy plant, the roots of daylilies can be dug up and divided during most of the growing season. Healthy daylilies have even been known to produce small plants at the top of old flower stems that can be cut and planted. Whether you separate the roots or work with the new plants at the top of the stalks, multiplying daylilies is an easy garden chore.
Examine the tops of old flower stems for the formation of proliferations, new young plants. If the new plants have root nodes or roots already extending, cut the stalks 2 to 3 inches below the new plants.
Remove about half of the foliage from the new plants. Place the foliage into cups of water to allow for additional root growth, keeping the water level even with the bottom of the new plant.
Fill pots with potting soil and plant the proliferations when they have a large healthy growth of roots. Keep the soil moist and grow the plants in their pots for about a month before planting into the garden.
Divide daylilies during the late summer or early fall for plants that will bloom the following year.
Loosen the root clump using a spade fork. Dig around the entire clump, about 6 to 8 inches from all sides. Lift the root clump out of the soil. Separate the individual plants that make up the root clump.
Replant the individual plants to the same depth they were growing. Remove approximately half of the foliage after planting. Water thoroughly.