Achillea millefolium var. occidentalis (Western yarrow)

Formerly known as Achillea lanulosa. Drought tolerant native forb with small, flat flowers in clusters. An aggressive species used for erosion control and habitat restoration. Commonly found throughout the U.S. in open fields or meadows and along roadsides. Tolerant of full sun, blooms spring to fall.

native distribution

ACMI2.png

INFORMATION & ATTRIBUTES

Family: Asteraceae

Duration: Perennial

Growth Habit: Forb

Native Status: Native

Growth Form: Rhizomatous

Mature Height:  36 in.

Bloom Color: White, occasionally pink

Bloom Period: Late Spring

Annual Precipitation:  6-26 in.

Drought Tolerance: High

Shade Tolerance: Medium

Elevation:

Wetland Indicator Status:

Fire Resistance: No

Fire Tolerance: High

Nitrogen Fixation: None

SOIL ADAPTATION

Coarse Texture: Yes

Medium Texture: Yes

Fine Texture: No

Salinity Tolerance: Low

CaCO3 Tolerance: Medium

pH Range: 6.0-8.0


SEEDING NOTES

Seeds per Pound: 3,400,000

Seeding Rate:  0.1-0.5 PLS lbs/acre

Season: Spring/Fall

Days to Germination:


VARIETIES & LOCAL ACCESSIONS

Columbia - Source Identified selection out of Sherman/Gillman, OR counties.

Eagle - For use on a broad range of semi-arid sites with long, hot growing seasons. Excellent for restoration, site stabilization, wildlife habitat and low-maintenance landscapes. (Released 2011, source of ecotype: Ada County, ID)

Yakima - Source Identified selection out of Yakima/Kittitas, WA counties.