Daylilies are hardy abundant plants that thrive in most soil types. As the name implies, the flowers generally only last for one full day. According to Mary H. Meyer from the University of Minnesota, daylily plants can be divided every three or four years. The clusters of plants should be separated in early spring or just after blooming. Plants that are transplanted in early spring may not bloom until the following year. Plants moved after blooming will have more than enough time to bloom the next spring and early summer.
Work the soil in the new grow bed with a rototiller. Make the new bed as deep as possible so the daylily roots are not bent when replanted. Mix in either rotted manure or compost into the bed.
Remove the daylily plants from the current location by digging them out with a shovel. Exercise caution so as not to damage the roots of the individual plants.
Cut the top leaves back to a height between 5 and 6 inches long with scissors.
Plant each daylily into the soil 1 inch deep. In other words, place the crown of the plant, that point where the roots meet with the upper foliage, 1 inch below the soil line.
Water the new transplants into the growing bed with plenty of water to remove any air pockets from around the roots.
Mulch around the new plants to protect the roots from any winter damage if you are transplanting late in the season. In most cases, late summer replanting will give more than enough time for the roots to establish themselves into the new area. Mulch will discourage weed growth and aid in retaining moisture to the new daylily location.