Allium gratisimum 'Mount Everest'
bulb corm tuber RHS Award

Mount Everest Onion

Allium gratisimum 'Mount Everest'

Not currently listed at our partner nurseries.

Expertly Curated
Real-Time Pricing
Loved by Designers

Essentials

At a Glance

Plant Type

Bulb Corm Tuber

Height

40 inches

Width

12 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

Central Asia

Toxicity

Toxic if ingested in large quantities

The Story

Plant Bio

Giant ornamental onion with tall, sturdy stems and large white spherical flower heads. Notable for its exceptional height and striking late spring display.

Uses & Benefits:

Ornamental UsesAllium gratisimum Mount Everest offers stunning vertical white flower clusters that add architectural interest and elegance to garden borders.
Practical UsesIts bulbs are hardy and low-maintenance, providing reliable spring color with minimal effort.
Ecological BenefitsAttracts pollinators like bees and butterflies, supporting local ecosystems.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

  1. Tuck bulbs 4–6 inches deep in well-drained soil in fall.
  2. Water thoroughly after planting to settle soil around bulbs.
  3. Mist cuttings in spring for propagation, keeping soil moist.
  4. Fertilize with balanced bulb fertilizer in early spring.
  5. Remove spent flower heads to promote bulb health.
  6. Mulch lightly to conserve moisture and suppress weeds.

Pro Tip

Plant in well-drained soil with full sun for best flowering results.

Keep It Thriving

Care Guide

Do

  • Water during dry spells 🌱
  • Mulch to retain soil moisture
  • Fertilize annually in early spring
  • Remove dead foliage after flowering

Don't

  • Avoid overwatering to prevent bulb rot ❌
  • Don’t disturb bulbs once established
  • Refrain from fertilizing late in the season
  • Avoid planting in heavy clay soil without amendment

Seasonal Care Calendar

TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deadhead
Divide
Fertilize
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Striking vertical accent in perennial bordersVanilla-scented flower bed edgeEdgy plant in rock gardens

Companion Plants

Tulips Daffodils Allium giganteum Sedum Lavender

Multiply

Propagation Methods

Good to Know

Common Questions

Mount Everest Onion questions

What zones can Mount Everest Onion grow in?

Mount Everest Onion is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Mount Everest Onion deer resistant?

Yes β€” Mount Everest Onion is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Mount Everest Onion bloom?

Mount Everest Onion typically blooms in late spring to early summer through early summer. Exact timing shifts a week or two with your zone β€” Sow's bloom calendar maps it to your garden.

Does Mount Everest Onion need full sun?

Mount Everest Onion does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Mount Everest Onion drought tolerant?

Yes β€” once established (usually after the first full season), Mount Everest Onion handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.

Keep exploring

Grow Mount Everest Onion with confidence

See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.

Download Sow on the App StoreGet Sow on Google Play