Size
Ultimate height
0.1–0.5 metresTime to ultimate height
1–2 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
°Â±ð±ô±ô–d°ù²¹¾±²Ô±ð»åpH
Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Blue Green | |||
|---|---|---|---|---|
| Summer | Blue Green | |||
| Autumn | ||||
| Winter |
Position
- Full sun
Aspect
South–facing or °Â±ð²õ³Ù–f²¹³¦¾±²Ô²µ
Exposure
Sheltered Hardiness
H3Botanical details
- Family
- Amaryllidaceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Clump forming
- Genus
Allium are bulbous herbaceous perennials with a strong onion or garlic scent, linear, strap-shaped or cylindrical basal leaves and star-shaped or bell-shaped flowers in an umbel on a leafless stem
- Name status
Unresolved
How to grow
Cultivation
Grow in free-draining, fertile soil in full sun. Keep well watered in dry periods but stop watering when bulbs become swollen. See how to grow: Onions for further advice
Propagation
Propagate by seed or by onion sets. See how to grow: onions or sowing vegetable seeds
Suggested planting locations and garden types
- City and courtyard gardens
- Cottage and informal garden
- Patio and container plants
- Flower borders and beds
Pruning
Remove faded leaves and spent flowers
Pests
May be susceptible to stem and bulb eelworm, leek moth and onion fly
Diseases
May be susceptible to rusts
Get involved
The RHS is the UK’s gardening charity, helping people and plants to grow - nurturing a healthier, happier world, one person and one plant at a time.