bulb corm tuber

Persian Onion

Allium x hollandicum

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Bulb Corm Tuber

Height

30 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 to pets if ingested

The Story

Plant Bio

Allium x hollandicum, commonly known as Holland garlic, is a hardy perennial that features globe-like clusters of star-shaped flowers atop tall stems. It is often used in borders and mixed flower beds. This hybrid is known for its large, spherical flower heads that add drama and architectural interest to the garden.

Bloom Period:

EarlyLate

Uses & Benefits:

Allium x hollandicum adds striking spherical blooms and a pleasant aroma, enhancing visual appeal in perennial beds.

Its natural pest deterrent helps protect neighboring plants, serving as a garden ally.

Provides nectar for pollinators like bees and butterflies, supporting local biodiversity.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck bulbs 2-4 inches deep in well-draining soil in fall.
Mist soil lightly to encourage root growth in early spring.
Water regularly during active growing season, avoiding waterlogging.
Apply a balanced fertilizer in early spring for healthy blooms.
Lift and divide overcrowded clumps every 3-4 years in late summer.
Mulch around plants to retain moisture and suppress weeds.

Pro Tip

Plant bulbs in a sunny spot with loose, well-draining soil for best results.

Keep It Thriving

Care Guide

Do

Water during dry spells 🌱
Apply fertilizer in early spring
Divide clumps every few years
Mulch to conserve moisture

Don't

Overwater, avoid soggy soil ❌
Plant too deep ❌
Neglect to divide overcrowded clumps
Use heavy clay soil without amendments

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Fertilize
Plant
Propagate
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Scented flower borderPerennial garden accentWildflower meadow

Companion Plants

Lavender Echinacea Coreopsis Salvia Yarrow

Multiply

Propagation Methods

Good to Know

Common Questions

Persian Onion questions

What zones can Persian Onion grow in?

Persian 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 Persian Onion deer resistant?

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

When does Persian Onion bloom?

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

Does Persian Onion need full sun?

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

Is Persian Onion drought tolerant?

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