bulb corm tuber

Giant Allium Schubert's Onion

Allium schubertii

The Story

Plant Bio

Allium schubertii is known for its unique, globe-shaped flower heads and is a striking addition to gardens.

The large spherical flower clusters can reach up to 10 inches across and are composed of numerous star-shaped florets.

Uses & Benefits:

Allium schubertii offers a stunning, starburst flower that creates a focal point in summer gardens, attracting admiration for its unique form.

Its natural pest resistance reduces the need for chemical treatments, simplifying garden maintenance.

Supports pollinators like bees and butterflies during its bloom period, enhancing local biodiversity.

Essentials

At a Glance

Plant Type

Bulb Corm Tuber

Height

24 inches

Width

12 inches

Light

Full Sun, Partial Sun

Zones

6, 7, 8, 9

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

Central Asia

Toxicity

Non-toxic to humans and pets

Bloom period

Late spring – Early summer

In flower about 2 months of the year

Planting

How to Grow

Tuck bulbs 4-6 inches deep in well-draining soil in fall.
Water thoroughly after planting to settle soil.
Allow foliage to die back naturally for bulb strength.
Divide bulbs every 3-4 years in early spring or fall.
Mulch lightly to protect from extreme cold or heat.
Enjoy the striking flower heads mid to late summer.

Pro Tip

Plant in full sun with excellent drainage for best blooms.

Keep It Thriving

Care Guide

Do

Water regularly during active growth 🌱
Apply a balanced fertilizer in spring
Support tall flower stems if necessary

Don't

Avoid overwatering to prevent bulb rot ❌
Do not plant in heavy clay soil without amendments
Skip fertilizing in late fall to prevent frost damage

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Harvest
Plant

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Dramatic focal point in perennial bordersArchitectural accent in rock gardensVertical interest in sunny beds

Companion Plants

Lavender Sedum Echinacea Rudbeckia Coreopsis

Multiply

Propagation Methods

Good to Know

Common Questions

Giant Allium Schubert's Onion questions

What zones can Giant Allium Schubert's Onion grow in?

Giant Allium Schubert's Onion is hardy in USDA Zones 6–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Giant Allium Schubert's Onion deer resistant?

Yes — Giant Allium Schubert's Onion is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Giant Allium Schubert's Onion bloom?

Giant Allium Schubert's Onion typically blooms in late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Giant Allium Schubert's Onion need full sun?

Giant Allium Schubert's Onion does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Giant Allium Schubert's Onion drought tolerant?

Yes — once established (usually after the first full season), Giant Allium Schubert's Onion handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.