Thrips, spider mites, aphids, slugs and snails are the main pests of daylilies. For more information see HGIC 2102, Daylily Problems . They are excellent ground covers on slopes. Their roots will hold soil against erosion once established. Small cultivars can be planted in containers.
Daylilies grow best in direct sun or light shade.
Darker-colored cultivars should be protected from strong afternoon sun that may fade the petals. They are however, very tolerant and will grow in almost any soil except poorly drained soils. If drainage is a problem, plant daylilies in raised beds. The best time to plant daylilies is during early fall or early spring when soil temperatures are moderate. Daylilies will tolerate planting during any time of year.