Overview
Allium 'Globemaster' is a clump forming bulbs in the genus Allium, part of the Amaryllidaceae family, with deciduous foliage. It typically grows around 0.5-1 metres tall and 0.1-0.5 metres wide, reaching full size in around 2-5 years. Allium 'Globemaster' grows best in full sun, and tolerates most soils and any pH. Its UK hardiness is rated H6. Suggested uses include wildlife gardens and wildflower meadows.
About
Allium 'Globemaster' is a clump-forming bulbous cultivar within the large Allium genus, which belongs to the Amaryllidaceae family. This deciduous plant typically grows to between 0.5 and 1 metre in height and prefers full sun exposure, ideally on west- or south-facing, sheltered sites. It thrives in a variety of soil types including chalk, loam, and sand, with a preference for moist but well-drained conditions. 'Globemaster' reaches its full height over two to five years and is notable for its summer season interest.
About the genus
Allium is a large genus of monocotyledonous flowering plants with 1112 accepted species, making Allium the largest genus in the family Amaryllidaceae and among the largest plant genera in the world. Many of the species are edible, and some have a long history of cultivation and human consumption such as the onion, garlic, scallions, shallots, leeks, and chives.
Wikipedia contributors, "Allium", CC BY-SA 4.0 — Allium
Growing conditions
Best soil and position for Allium
- Sunlight
- Full sun
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Well-drained
- Aspect
- West-facing, South-facing
- Exposure
- Sheltered
- UK hardiness
- H6
Plant details
Allium 'Globemaster' size, habit and characteristics
- Plant type
- Bulbs
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- Wildlife gardens, Wildflower meadows
- Fragrance
- Mildly fragrant
Care notes
Pruning and caring for Allium 'Globemaster'
- Cultivation
- Plant bulbs in autumn, 10-15 cm deep and 15-20 cm apart. Prefers full sun and well-drained soil. Mulch in winter to protect from frost.
- Pruning
- Remove spent flower heads to prevent self-seeding and encourage bulb energy storage. Cut back foliage only after it has yellowed and died back naturally.
- Propagation
- Seed, Division
- Pest resistance
- Generally pest-free
- Disease resistance
- Onion white rot, Downy mildews
Frequently asked questions
How do I grow Allium 'Globemaster'?
Plant bulbs in autumn, 10-15 cm deep and 15-20 cm apart. Prefers full sun and well-drained soil. Mulch in winter to protect from frost.
Where is the best place to plant Allium 'Globemaster'?
Allium 'Globemaster' prefers full sun. It suits sheltered positions.
What soil does Allium 'Globemaster' need?
Allium 'Globemaster' is adaptable and grows happily in most soil types, including chalk, 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 'Globemaster'?
Remove spent flower heads to prevent self-seeding and encourage bulb energy storage. Cut back foliage only after it has yellowed and died back naturally.
How big does Allium 'Globemaster' grow?
Allium 'Globemaster' reaches a height of 0.5-1 metres and a spread of 0.1-0.5 metres. It takes around 2-5 years to reach full size.
Is Allium 'Globemaster' hardy in the UK?
Allium 'Globemaster' has an RHS hardiness rating of H6, meaning it is very hardy, tolerating -20 to -15°C across most of the UK.
How do I propagate Allium 'Globemaster'?
Seed, Division.
More in the Allium genus
- Allium 'Judith'
- Allium 'Summer Beauty'
- Allium cepa 'Goldito'
- Allium christophii (albopilosum)Star of Persia
- Allium hookeri 'Zorami'Hooker Chives
- Allium phanerantherumconspicuous-anthered garlic
- Allium 'Millenium'
- Allium schmitzii