Overview
Allium schoenoprasum is a clump forming bulbs in the genus Allium, part of the Amaryllidaceae family, with deciduous foliage. It typically grows around 0.1-0.5 metres tall and 0-0.1 metre wide, reaching full size in around 2-5 years. Allium schoenoprasum grows best in full sun and partial shade, and tolerates most soils and any pH. Its UK hardiness is rated H6. It is attractive to pollinators. Suggested uses include cottage and informal garden, patio and container plants and wildlife gardens. It is native to Temp N Hemisphere.
About
Allium schoenoprasum is a compact perennial that produces a dense cluster of upright, hollow leaves with a distinct onion aroma, reaching heights of around 30 cm. Above these leaves, it showcases rounded clusters of light purple, bell-shaped flowers. This herb is well-regarded for its culinary versatility, as both its leaves and flowers are consumable. The small blooms are abundant in nectar, making them appealing to bees and various pollinators.
About the genus
Allium consists of bulbous herbaceous perennials characterized by a pronounced onion or garlic aroma. They feature linear, strap-like, or cylindrical leaves that arise from the base. The flowers, which can be star-shaped or bell-shaped, are arranged in an umbel atop a stem that lacks leaves.
Growing conditions
Best soil and position for Allium
- Sunlight
- Full sun, Partial shade
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H6
Plant details
Allium schoenoprasum size, habit and characteristics
- Plant type
- Bulbs, Herbs - Culinary
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 0.1-0.5 metres
- Spread
- 0-0.1 metre
- Time to full height
- 2-5 years
- Suggested uses
- Cottage and informal garden, Patio and container plants, Wildlife gardens
- Native to
- Temp N Hemisphere
- Fragrance
- Foliage
Care notes
Pruning and caring for Allium schoenoprasum
- Cultivation
- Easy to grow in fertile, well-drained soil. Add grit when grown in clay soils to improve drainage. May have the potential to become a nuisance if not managed well. See chive cultivation for further advice
- Pruning
- Harvest leaves regularly to promote new, fresh growth. Alternatively, cut back the clump to 5cm from the base after flowering
- Propagation
- Propagate by seed, bulbs or division
- Pest resistance
- Generally pest-free
- Disease resistance
- Generally disease-free. Onion white rot and onion downy mildew may occur
Frequently asked questions
How do I grow Allium schoenoprasum?
Easy to grow in fertile, well-drained soil. Add grit when grown in clay soils to improve drainage. May have the potential to become a nuisance if not managed well. See chive cultivation for further advice.
Where is the best place to plant Allium schoenoprasum?
Allium schoenoprasum prefers full sun and partial shade. It suits exposed and sheltered positions.
What soil does Allium schoenoprasum need?
Allium schoenoprasum is adaptable and grows happily in most soil types, including chalk, clay, loam and sand. It is happy in soil of any pH. Aim for soil that stays moist but well-drained to well-drained.
How do I prune Allium schoenoprasum?
Harvest leaves regularly to promote new, fresh growth. Alternatively, cut back the clump to 5cm from the base after flowering.
How big does Allium schoenoprasum grow?
Allium schoenoprasum reaches a height of 0.1-0.5 metres and a spread of 0-0.1 metre. It takes around 2-5 years to reach full size.
Is Allium schoenoprasum hardy in the UK?
Allium schoenoprasum has a UK hardiness rating of H6.
How do I propagate Allium schoenoprasum?
Propagate by seed, bulbs or division.
Is Allium schoenoprasum good for pollinators?
Yes — Allium schoenoprasum attracts and supports pollinators such as bees and other beneficial insects.