Over 20,000 hybrids do exist, and improvements in plant habit, flower form, and color have made these hybrids quite desirable as garden plants. Although daylilies tolerate poor care or neglect because of their tough, resilient nature, best growth and flowering are obtained by using the following cultural procedures. Sandy or heavy clay soils can be improved prior to planting, to a depth of 12 inches, by incorporating amendments such as sphagnum peat moss, bark mulch, or composted leaves. Add equal parts of such amendments to parts of soil. Most daylilies will grow well when they receive at least 6 hours of sunlight daily.
Some bright colors fade in full sun, but in general the plants prefer bright, sunny locations.
Flowers will open to face the sun or bright light, so place them with this in mind. A warm, sheltered, south-facing site may speed up bloom time slightly, and will yield good results. Irrigations should be deep rather than shallow and should be gauged to the site's requirement. Watering overhead late in the day may damage tomorrow's flowers, so timing is important. Also, it is advisable to water in the morning rather than evening, because moisture on the foliage overnight may encourage leaf diseases.