Allium albopilosum (Onion, Flowering) — Upright bare stems from a bulb

Overview

Allium albopilosum is a upright bare stems from a bulb bulb in the genus Allium, part of the Amaryllidaceae family, with deciduous; strap-shaped or grassy basal leaves, dying back as the flowers open foliage. Allium albopilosum grows best in full sun, and tolerates most soils and neutral to alkaline pH. Its UK hardiness is rated H4-H6. Suggested uses include borders, rock gardens and containers. It is native to Central Asia.

About

Allium albopilosum is a bulb that produces upright, bare flowering stems from a single bulb. It has deciduous, strap-shaped basal leaves that die back as the flowers open. A member of the Amaryllidaceae, it is native to Central Asia and flowers from May to July. The plant suits a sunny, well-drained position on neutral to alkaline soils.

Wikipedia contributors, CC BY-SA 4.0 — Allium cristophii

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

In the garden

Allium albopilosum belongs to the Amaryllidaceae and arises from a solitary bulb, sending up upright bare stems above a rosette of strap-shaped, grassy leaves. Those basal leaves are deciduous and typically die back as the flowers open; flowering occurs from May to July. The species originates in Central Asia. Give Allium albopilosum a position in full sun on light, free-draining soil such as loam, sand or chalk and avoid heavy, waterlogged ground because bulbs will rot in wet conditions. It favours neutral to alkaline pH and performs in both exposed and sheltered sites; place it on a south or west-facing aspect where possible. Hardiness is rated H4–H6 (average to very hardy), so it is suitable for most UK gardens provided drainage is good. Use it in mixed borders, rock gardens or in containers where you can control moisture. Because the basal leaves die back as the flowers appear, consider planting it with early-season companions that can mask the fading foliage, or position it where natural cover conceals the bare ground after flowering.

Growing conditions

Best soil and position for Allium

Sunlight: Full sun
Soil type: Light, free-draining loam, sand or chalk
Soil pH: Neutral to alkaline
Soil moisture: Well drained; bulbs rot in wet ground
Aspect: South or west facing
Exposure: Exposed or sheltered
UK hardiness: H4-H6

Plant details

Allium albopilosum size, habit and characteristics

Plant type: Bulb
Habit: Upright bare stems from a bulb
Foliage: Deciduous; strap-shaped or grassy basal leaves, dying back as the flowers open
Suggested uses: Borders, rock gardens, containers
Native to: Central Asia

Care notes

Pruning and caring for Allium albopilosum

Cultivation: Plant bulbs in autumn at roughly three times their depth in the sunniest, best-drained ground available; on heavy soil add grit beneath the bulb. Site them behind or among lower perennials, since the foliage yellows and collapses just as the heads open. Leave the leaves to die down completely rather than removing them, and most kinds will bulk up and self-seed steadily.
Pruning: Leave the seedheads standing - they are among the best structural remains in a late-summer border - and cut the stems at the base only once they finally break down.
Propagation: Separate offsets when the bulbs are dormant in late summer. Species come readily from seed but take two to four years to flower, and many self-sow generously.
Pest resistance: Allium leaf miner and onion fly can affect the larger-bulbed kinds; otherwise little troubled.
Disease resistance: White rot and downy mildew occur in wet ground or where alliums have been grown repeatedly on the same site.

Frequently asked questions

How do I grow Allium albopilosum?

Plant bulbs in autumn at roughly three times their depth in the sunniest, best-drained ground available; on heavy soil add grit beneath the bulb. Site them behind or among lower perennials, since the foliage yellows and collapses just as the heads open. Leave the leaves to die down completely rather than removing them, and most kinds will bulk up and self-seed steadily.

Where is the best place to plant Allium albopilosum?

Allium albopilosum prefers full sun. It suits exposed or sheltered positions.

What soil does Allium albopilosum need?

Allium albopilosum is adaptable and grows happily in most soil types, including light, free-draining loam and sand or chalk. It prefers neutral to alkaline soil. Aim for soil that stays well drained; bulbs rot in wet ground.

How do I prune Allium albopilosum?

Leave the seedheads standing - they are among the best structural remains in a late-summer border - and cut the stems at the base only once they finally break down.

Is Allium albopilosum hardy in the UK?

Allium albopilosum has an RHS hardiness rating of H4, meaning it is hardy through an average UK winter, tolerating -10 to -5°C.

How do I propagate Allium albopilosum?

Separate offsets when the bulbs are dormant in late summer. Species come readily from seed but take two to four years to flower, and many self-sow generously.

More in the Allium genus

Browse all Allium →