Although they are similar in appearance and are called lilies, daylilies are not true lilies. According to the University of Minnesota Extension, daylilies thrive in a range of soil types and require little care. These hardy plants survive for many years, creating larger clumps each year. Although they naturalize easily, daylilies benefit from lifting and dividing the roots every three or four years. Dividing in the fall allows roots time to become established before cold weather returns.
Cut back foliage to a height of 5 to 6 inches in early fall.
Dig under the roots with a garden spade or garden fork. Slide the spade under the root ball and lift the entire plant free of the soil. Shake off excess soil.
Pull the plant into sections with your hands by tugging on the fans of foliage. Leave three to five fans to each clump.
Replant the sections in a location with similar lighting, soil and moisture as the original plant. Mary H. Meyer, assistant horticulture professor from the University of Minnesota, recommends positioning the plants so the crown rests 1 inch below the soil surface. The crown is the area where the roots join the stem.
Fill in around the roots with soil and firm down with your hands to remove air pockets and secure the plant.
Water thoroughly to moisten the soil to the root level. Water once or twice a month until winter.