Daylily
Hemerocallis spp.
Other names: Day lily
Daylilies form arching clumps of strap-shaped leaves topped by trumpet flowers in summer. Each flower lasts a single day, but a mature clump opens new ones for weeks. They are among the toughest perennials and grow in almost any soil.
How to grow daylily
Light
Full sun gives the most flowers. In hot climates, light afternoon shade keeps dark red and purple flowers from fading.
Watering
Water weekly during the first season and while buds are forming. Established clumps tolerate dry spells but flower best with regular moisture.
Soil and feeding
Daylilies accept most soils. Work compost into the planting area and feed once in spring with a balanced fertilizer.
Planting and pruning
Plant in spring or early fall with the crown no more than 1 in (2.5 cm) below the surface. Remove spent flowers, cut each stalk to the ground when it finishes, and clear the dead foliage in late fall.
Propagation
Divide crowded clumps every three to five years, in early spring or just after flowering. Split the clump into fans with roots attached and replant them 18 to 24 in (45–60 cm) apart.
Common problems
- Fewer flowers each year
- The clump is overcrowded or shaded. Divide it and replant in full sun.
- Orange powdery spots on leaves
- Daylily rust. Remove affected foliage and avoid overhead watering.
- Buds that fail to open
- Thrips or gall midge. Pick off and bin distorted buds.
Questions about daylily
Do daylilies bloom all summer?
Most varieties flower for three to four weeks. Reblooming types such as 'Stella de Oro' flower again through summer if you remove the spent stalks.
Are daylilies true lilies?
No. True lilies grow from bulbs and belong to the genus Lilium. Both are highly toxic to cats.
Plant details
| Botanical name | Hemerocallis spp. |
|---|---|
| Family | Asphodelaceae |
| Native range | China, Korea and Japan |
| Plant type | Perennials. Herbaceous perennial |
| Soil | Average, well-drained soil |
| Flower color | Orange, yellow, red, pink, purple |
