How much sun does Narrowleaf onion need?

Narrowleaf onion grows best in full sun conditions.

When does Narrowleaf onion bloom?

Narrowleaf onion blooms in April, May, and June.

Where is Narrowleaf onion native?

Narrowleaf onion (Allium amplectens) is native to CA, OR, WA, per the World Checklist of Vascular Plants (Kew).

What pollinators does Narrowleaf onion attract?

Narrowleaf onion draws bees and butterflies.

Narrowleaf onion

Name: Pollinator Patch
Author: Pollinator Patch

Allium amplectens

Last reviewed: November 2026

Narrowleaf onion (Allium amplectens) is a perennial forb native to CA, OR, WA. It blooms in April, May, and June. The flowers draw bees and butterflies.

Watering reminders and freeze alerts for Narrowleaf onion, free in the app.

Toxicity unknown

Narrowleaf onion (Allium amplectens) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

full sun

Water

low

Size

8"–16" H × 3"–6" W

Bloom

Apr, May, Jun

Native to

CA, OR, WA

Pollinators

bees, butterflies

Before you buy

Your city may pay you to plant this

Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 461 programs across 44 states, each with a link to the provider and the date we last checked it.

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Browse plants for this ecoregion

Coast Range Marine West Coast Forest Northwestern Forested Mountains Sierra Nevada Central California Foothills and Coastal Mountains Central California Valley Southern California Mountains North American Deserts

Small bulb with grass-like foliage and rounded clusters of white to pale pink star-shaped flowers in spring. Found in grassy meadows and rocky openings, going dormant after bloom.

Growing Narrowleaf onion

Grow Narrowleaf onion in full sun and low water. Mature plants reach 8 to 16 inches tall and spread 3 to 6 inches wide.

Wildlife value

Spring flowers attract native bees and small butterflies.

Common questions

How much sun does Narrowleaf onion need?: Narrowleaf onion grows best in full sun conditions.
When does Narrowleaf onion bloom?: Narrowleaf onion blooms in April, May, and June.
Where is Narrowleaf onion native?: Narrowleaf onion (Allium amplectens) is native to CA, OR, WA, per the World Checklist of Vascular Plants (Kew).
What pollinators does Narrowleaf onion attract?: Narrowleaf onion draws bees and butterflies.

Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

See all plant problem guides

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