How much sun does Beachbur need?

Beachbur grows best in full sun conditions.

When does Beachbur bloom?

Beachbur blooms in May, June, July, August, September, and October.

Where is Beachbur native?

Beachbur (Ambrosia chamissonis) is native to CA, OR, WA, per vouchered herbarium specimen records and regional native plant society lists.

Beachbur

Name: Pollinator Patch
Author: Pollinator Patch

Ambrosia chamissonis

Last reviewed: November 2026

Beachbur (Ambrosia chamissonis) is a perennial forb native to CA, OR, WA. It blooms in May, June, July, August, September, and October. The flowers draw wind.

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

Toxicity unknown

Beachbur (Ambrosia chamissonis) 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

6"–12" H × 36"–60" W

Bloom

May, Jun, Jul, Aug, Sep, Oct

Native to

CA, OR, WA

Pollinators

wind

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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Try it with your yard

Browse plants for this ecoregion

Coast Range Puget Lowland Central California Foothills and Coastal Mountains Southern California/Northern Baja Coast

A sprawling, silvery-leaved perennial that forms loose mats across coastal sand, with coarse foliage and inconspicuous wind-pollinated flower spikes. Its informal, dune-hugging habit is functional rather than ornamental.

Growing Beachbur

Grow Beachbur in full sun and low water. Mature plants reach 6 to 12 inches tall and spread 36 to 60 inches wide.

Wildlife value

Its deep, sand-stabilizing roots and low mat form provide cover for dune-dwelling insects and small animals.

Common questions

How much sun does Beachbur need?: Beachbur grows best in full sun conditions.
When does Beachbur bloom?: Beachbur blooms in May, June, July, August, September, and October.
Where is Beachbur native?: Beachbur (Ambrosia chamissonis) is native to CA, OR, WA, per vouchered herbarium specimen records and regional native plant society lists.
What pollinators does Beachbur attract?: Beachbur draws wind.

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.

See all plant problem guides

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