Allium Globemaster 3L

Allium ‘Globemaster’

Allium ‘Globemaster’, commonly known as **Giant Ornamental Onion**, is a striking perennial bulb renowned for its **huge, violet-purple spherical flower heads** that reach up to 20cm in diameter. Flowering in **late spring to early summer**, it adds dramatic architectural interest to borders and garden displays.

Sun Requirement: Full Sun Rate of Growth: Moderate Soil Type: Well-drained, Fertile Hardiness: H5 (-10C to -15C) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Why Choose Allium ‘Globemaster’?

• **Huge flower heads** up to 20cm across for bold garden impact.
• **Bee-friendly** attracts pollinators and beneficial insects.
• **Long-lasting blooms** for weeks of garden colour.
• **Drought-tolerant** once established.

Allium ‘Globemaster’ – Description

Potted: Bulbous Perennial

Common Name: Giant Ornamental Onion

Other Names: Allium ‘Globemaster’

Indoors or Outdoors: Outdoors

Size: Height 80cm, Spread 20cm

Allium ‘Globemaster’ – Characteristics

Mature Size: Reaches up to 80cm in height and spreads up to 20cm.

Evergreen or Deciduous: Deciduous

Preferred Position: Thrives in full sun.

Hardy or Not Hardy: Hardy to -10C.

Diseases: Generally disease-resistant but may suffer from onion rot in poorly drained soils.

Allium ‘Globemaster’ – Uses

Uses in Garden: Ideal for borders, gravel gardens, and architectural interest.

Allium ‘Globemaster’ – Planting Instructions

Sowing Time: Plant bulbs in autumn.

Soil & Watering: Prefers well-drained soil and moderate watering.

Trench Preparation: Plant bulbs 10-15cm deep.

Pruning Tips: Remove spent flower heads to prevent self-seeding.

Plant at a Glance

• facing:south
• facing:west
• light requirement:full sun
• soil type:well-drained
• soil type:fertile
• flowering:may
• flowering:june
• flower colour:purple
• leaf colour:green
• plant type:deciduous
• size category:80cm
• soil moisture:moist but well-drained
• special conditions:coastal
• garden style:formal
• garden style:architectural