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Big tarweed

Blepharizonia plumosa

Also called Big Tarplant, Big Tarweeds

Big tarweed
Photo: Ken-ichi Ueda, CC BY 4.0

Big tarweed is a sticky, aromatic annual herb native to central California, growing up to about 2 m tall with white daisy-like flower heads. It is a wild native of grassland and hillside habitats rather than a commonly cultivated garden plant.

Family
Asteraceae (Daisy family)
Light
Full sun
Water
Water sparingly; it is adapted to dry summers and needs little or no irrigation once established.
Soil
Well-drained, dry soils such as sandy or loamy native substrates.
Temperature
Adapted to Mediterranean California climate, tolerant of warm dry summers and mild winters.
How easy
Moderate
Native range
California

About

Blepharizonia plumosa is a California species of tarweed known by the common name big tarweed. It is endemic to central California, where it grows in the Central Coast Ranges and adjacent sections of the southern San Francisco Bay Area and Central Valley, from southern Sonoma County south as far as San Luis Obispo County.

Other Blepharizonia plants

Glandular Big Tarweed · Big Tarweeds

Text excerpted from the Wikipedia article Blepharizonia plumosa by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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