Q. How can I transplant daylillies?
Daylilies (Hemerocallis spp.) can be transplanted anytime after they have finished flowering, although the best time is in early spring. Fall planting should be done only in warmer climates (USDA Zones 7 and higher).
Prepare the new bed ahead of time by deep digging and adding compost. Daylilies prefer a sunny location with at least 6 hours of sun but they will flower, although not as well, in shadier locations. To divide an existing clump, dig around the plant with a fork and carefully remove enough soil to expose the roots. The plant can then be divided, using a small gardening fork or a garden knife, either in place or by lifting it out of the ground first. Make the cuts so that you have three or four fans per clump.
Dig a hole in the prepared bed a little larger than the new clump. Dig the hole large enough to accommodate the plant's root system, and make a small mound of soil in the bottom of the hole. Spread the roots evenly around the mound. The crown of the plant, where the roots of the plant join the stem, should be no more than 1 inch below the top of the soil. Water the plants well and continue to water throughout the first summer.
Courtesy of NYBG Plant Information