Plant Rainbow Rhythm® Storm Shelter Daylilies in well-drained soil with full sun to partial shade. Space plants 18-24 inches apart. Water regularly, especially during dry spells, to keep the soil consistently moist but not waterlogged. Fertilize in early spring with a balanced, slow-release fertilizer. Remove spent blooms to encourage more flowering. Divide clumps every 3-5 years in early spring or late summer to maintain vigor.