How much sun does Scytheleaf onion need?

Scytheleaf onion grows best in full sun conditions.

When does Scytheleaf onion bloom?

Scytheleaf onion blooms in May, June, and July.

Where is Scytheleaf onion native?

Scytheleaf onion (Allium falcifolium) is native to CA, OR, per vouchered herbarium specimen records and regional native plant society lists.

Scytheleaf onion

Name: Pollinator Patch
Author: Pollinator Patch

Allium falcifolium

Last reviewed: November 2026

Scytheleaf onion (Allium falcifolium) is a perennial forb native to CA, OR. It blooms in May, June, and July. The flowers draw bees.

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

Toxicity unknown

Scytheleaf onion (Allium falcifolium) 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

4"–8" H × 4"–8" W

Bloom

May, Jun, Jul

Native to

CA, OR

Pollinators

bees

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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Upload a photo of your yard and Patch Vision shows a rendering of it planted with natives for your region, like Scytheleaf onion.

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Browse plants for this ecoregion

Coast Range Northwestern Forested Mountains Central California Foothills and Coastal Mountains Central California Valley

A small bulb-forming perennial with a pair of curved, sickle-shaped gray-green leaves and a tight rounded umbel of rose-purple star flowers. It grows in thin, rocky soils and goes fully dormant after flowering.

Growing Scytheleaf onion

Grow Scytheleaf onion in full sun and low water. Mature plants reach 4 to 8 inches tall and spread 4 to 8 inches wide.

Wildlife value

The summer flowers are a nectar source for native bees on otherwise sparsely vegetated rocky ground.

Common questions

How much sun does Scytheleaf onion need?: Scytheleaf onion grows best in full sun conditions.
When does Scytheleaf onion bloom?: Scytheleaf onion blooms in May, June, and July.
Where is Scytheleaf onion native?: Scytheleaf onion (Allium falcifolium) is native to CA, OR, per vouchered herbarium specimen records and regional native plant society lists.
What pollinators does Scytheleaf onion attract?: Scytheleaf onion draws bees.

Native range data from vouchered herbarium specimen records and regional native plant society lists. 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.

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Ready to grow Scytheleaf onion? Add it to your garden in the Pollinator Patch App to track it and get season-by-season care guidance.

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