Too much nitrogen will cause lush foliage growth and no blooms. Apply fertilizer in late winter, early spring, and early summer. For most cultivars, space 18 inches apart. Loosen soil as needed beyond and beneath the hole itself. Place the daylily so that the crown is no deeper than the soil line, or is slightly above it.
Daylilies are usually pest-free.
However, if scale or aphids develop, treat with insecticidal soap or horticultural oil sprays. If mites develop in hot, dry weather, spray foliage daily with plain water, and spray with mild soap solution twice a week if needed. Following bloom, the brown, dead scape may be removed easily by pulling. This should be done in September. If done in spring, new divisions will be too tender and plants are likely to make deformed blooms or no blooms that season.