Coast Tarweed | Madia sativa - Benton Soil And Water Conservation District

Coast Tarweed | Madia sativa

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Green plant with fuzzy leaves and clusters of small, yellow flowers.

A FALL BULB AND SEED SALE ITEM

One packet of seeds contains about 1500 seeds and covers about 36 square feet.

Clusters of yellow disk and ray flower heads top this aromatic annual plant with bristly stems. Entire plant sticky to the touch. Blooms summer through fall.

Plant Details

Habitats	Upland Prairie and Savanna, Shrub Swamp, Wet Prairie
Habitat Notes	Found in meadows and prairies and along the west coast from Alaska to Baja California.
Phenology	Annual; flowering June-September
Mature Height	8-40"
Shade Preference	Full sun
Soil Tolerance	Well-drained soils of any texture
Ethnobotany	Tarweed seeds were a stable food and oil source for Indigenous tribes in the Willamette Valley and Coast Range

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Native Plant Database

We have a large searchable database of plants that are native to the Willamette Valley and other parts of Benton County. View images and filter the list by plant characteristics

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Why Plant Native Plants?

There are so many good reasons to plant native plants!

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Native Plant Sales

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Upland Prairie and Savanna

Upland prairies or open grasslands are among the most threatened ecosystems in Oregon. Historically, they occurred across the Willamette Valley and are vegetated by perennial grasses and annual or…

Shrub Swamp

Shrub swamps are typically located in depressions, around lakes or ponds or on river terraces. They tend to flood seasonally and are dominated by shrubs or trees that are rooted in hydric soils. These…

Wet Prairie

Wet prairies were once a common habitat in the floodplain of the Willamette River. These habitats occur on poorly drained clay soils or shallow soils above bedrock. Seasonal flooding creates anaerobic…