Round-headed garlic (Allium sphaerocephalon) is a bulbous (or similar) plant that can grow 50cm – 1.5m tall and 10cm – 50cm wide.
This plant has several common names including: round-headed garlic or round-headed leek.
This is a deciduous plant that takes 2-5 years to reach full maturity.
Plant profile
Common name: round-headed garlic, round-headed leek
Scientific name: Allium sphaerocephalon
Plant type: Bulbs
Habit: Bushy
Height: 50cm – 1.5m
Spread: 10cm – 50cm
Foliage: Deciduous
Sunlight: Full Sun
Soil: Chalk, Clay, Loam, Sand
Moisture: Moist but well drained, Well drained
Garden type: City & Courtyard Gardens, Coastal, Informal Garden, Patio & Container Garden
Planting type: Flower borders and bedding
Other characteristics: Plants for pollinators, RHS Award of Garden Merit
Seasonal colors
| Season | Stem | Foliage | Flower | Fruit |
|---|---|---|---|---|
| Spring | ||||
| Summer | ||||
| Autumn | ||||
| Winter |

How to plant Round-headed garlic (Allium sphaerocephalon) – Stefan.lefnaer, CC BY-SA 4.0, via Wikimedia Commons

Cultivation profiles – Growing Round-headed garlic (Allium sphaerocephalon) – Agnieszka Kwiecień, Nova, CC BY-SA 4.0, via Wikimedia Commons



