Compost or farmyard manure should be incorporated. The crown must be planted at the same level as it has been growing, deep enough to cover the non-green portion of the roots, not deeper than 1 inch in our area, or it may not bloom. Apply mulch 2 to 3 inches thick for permanent cover and soil enrichment. Feeding is necessary to nourish the root system, resulting in larger flowers and a longer blooming season. For established plants, usually a good feeding in the spring is sufficient.
Water is even more important to the health of daylilies than feeding.
Without sufficient water the plants look limp, the foliage is poor color, the flowers are sparse, poorer and of thinner substance, the length of the bloom period is affected, and there is less or no re-bloom. Daylilies growing in containers in full sun need watering twice a day. A mature clump of daylilies can be divided by digging and separating the fans. Division can be done any time of the year, at least a month before the first hard freeze.