Hemerocallis 'Killer'
daylily 'Killer'
An upright, clump-forming perennial to 70cm high, with semi-evergreen, strap-shaped foliage. Large, triangular flowers to 15cm across are borne in summer on branching stems, with deep violet purple, recurved petals with lightly frilly edges, a black eye zone and lime green throats
Size
Ultimate height
0.5–1 metresTime to ultimate height
1–2 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Purple Black Green | Green | ||
| Autumn | Green | |||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered Hardiness
H6Botanical details
- Family
- Asphodelaceae
- Native to the UK
- No
- Foliage
- Semi evergreen
- Habit
- Clump forming
- Potentially harmful
- TOXIC to pets (cats) - see the HTA guide to potentially harmful plants for further information and useful contact numbers
- Genus
Hemerocallis may be evergreen or herbaceous perennials, with narrow, strap-shaped leaves and funnel-shaped flowers on erect stems in late spring or early summer
- Name status
Accepted
How to grow
Cultivation
Grow in fertile, well drained soil, in areas that will not dry out in summer. Prefers full sun, flowering is likely to be reduced in shadier situations. Water freely from spring to summer. See Hemerocallis cultivation for details.
Propagation
Propagate by division in early spring or autumn, at least six weeks before the first frost. Divide every 2-3 years to maintain vigour. Propagate from seed in containers in a cold frame in autumn or spring; cultivars will not come true from seed
Suggested planting locations and garden types
- City and courtyard gardens
- Cottage and informal garden
- Patio and container plants
- Flower borders and beds
Pruning
Cut back flower stems after flowering has finished. Remove dead foliage as required
Pests
May be susceptible to hemerocallis gall midge, aphids, glasshouse red spider mite and thrips. Slugs and snails may damage young leaves
Diseases
May be susceptible to rust diseases. In climates with alternating winter frosts and thaws, bacterial leaf and stem rot (spring sickness) may be a problem; in areas with high temperatures and high humidity, crown rot may cause damage
Get involved
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