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Index / Search / Achillea millefolium var. occidentalis

§1 Plant

Achillea millefolium L. var. occidentalis DC.

vernacular western yarrow — variety · Asteraceae

USDA
ACMIO
GBIF
4215536
Rank
variety
western yarrow (Achillea millefolium var. occidentalis)
Platephotograph · Steve GuttmanCC BY-NC-ND source · iNaturalist ↗

§2Habit & range

Habit and range

Growth habit
Forb/herb
Duration
Perennial
Group
Dicot
Family
Asteraceae Bercht. & J. Presl
Genus
Achillea
§2a

Native status, by region

  • AK Alaska Native
  • CAN Canada Native
  • GL Greenland Native
  • L48 Lower 48 States Native
  • SPM St. Pierre & Miquelon Native
§2b

County-level range

· 1,212 counties across 42 states/territories
Legend Native · 1212 Introduced · 0 Both · 0 Hover a county for detail.

§3Cultivation specs · USDA

Recorded by the USDA Plant Materials Program.

§3a

Tolerances

Drought
Medium
Shade
Medium
Moisture use
Medium
Fire
High
Salinity
Low
Anaerobic
None
CaCO₃
Medium
Hedging
None
§3b

Climate & soil

Cold tolerance
-38 °F minimum
Frost-free days
100 min.
Precipitation
8–26 in/yr
pH range
6–8
Root depth
8 in min.
Fertility need
Low
Soil texture
coarse, medium
§3c

Form & growth

Growth form
Rhizomatous
Growth rate
Moderate
Lifespan
Moderate
Mature height
3 ft
Foliage texture
Fine
Foliage colour
Green
Porosity (summer)
Porous
Porosity (winter)
Porous
Flower colour
White
Fruit colour
Brown
Fire resistant
No
N fixation
None
Toxicity
Slight
§3d

Reproduction

Bloom period
Late Spring
Seed abundance
Medium
Seed begins
Summer
Seed ends
Fall
Spread rate
Moderate
Stratify
No
Seeds / lb
3,411,818
Propagation
seed, sprigs
§3e

Use & availability

Commercial availability
Routinely Available
Nursery stock
No
Browse palatability
Low
Graze palatability
Low
Palatable, human
No
Protein potential
Low
Lumber
No
Christmas tree
No

§4Counties, by state

Recorded in 1,212 counties across 42 states/territories.

Alabama view state ↗ 8 N ▾
Arizona view state ↗ 8 N ▾
Arkansas view state ↗ 59 N ▾
California view state ↗ 15 N ▾
Colorado view state ↗ 41 N ▾
Delaware view state ↗ 1 N ▾
District of Columbia view state ↗ 1 N ▾
Georgia view state ↗ 17 N ▾
Idaho view state ↗ 29 N ▾
Illinois view state ↗ 13 N ▾
Indiana view state ↗ 87 N ▾
Iowa view state ↗ 26 N ▾
Kansas view state ↗ 92 N ▾
Kentucky view state ↗ 12 N ▾
Louisiana view state ↗ 32 N ▾
Massachusetts view state ↗ 9 N ▾
Michigan view state ↗ 1 N ▾
Minnesota view state ↗ 27 N ▾
Mississippi view state ↗ 2 N ▾
Missouri view state ↗ 67 N ▾
Montana view state ↗ 21 N ▾
Nebraska view state ↗ 45 N ▾
Nevada view state ↗ 17 N ▾
New Jersey view state ↗ 4 N ▾
New Mexico view state ↗ 23 N ▾
New York view state ↗ 8 N ▾
North Carolina view state ↗ 88 N ▾
North Dakota view state ↗ 49 N ▾
Ohio view state ↗ 5 N ▾
Oklahoma view state ↗ 51 N ▾
Oregon view state ↗ 3 N ▾
Pennsylvania view state ↗ 1 N ▾
South Carolina view state ↗ 30 N ▾
South Dakota view state ↗ 41 N ▾
Tennessee view state ↗ 48 N ▾
Texas view state ↗ 2 N ▾
Utah view state ↗ 1 N ▾
Vermont view state ↗ 1 N ▾
Virginia view state ↗ 100 N ▾
Washington view state ↗ 36 N ▾
Wisconsin view state ↗ 71 N ▾
Wyoming view state ↗ 20 N ▾

§5Sources & provenance

USDA PLANTS

Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.

plants.usda.gov/ACMIO ↗

GBIF Backbone

Canonical taxonomic identity, synonym resolution, cross-refs. CC0.

gbif.org/species/4215536 ↗

Record version

Cached and built locally. Source version on this record:

usda-plants-mt-2026-05-26

fetched 2026-05-26T20:46:58Z