Common Yarrow
Achillea millefolium
Common Yarrow (Achillea millefolium) is a Colorado-native perennial suited to the Colorado Front Range. It matures to about 18 in tall and 18 in wide, needs low water, and prefers full sun. CO native perennial; supports pollinators.
Colorado nativeOn the CSU listlow water18 in tall and 18 in wideXeric / water-wiseLow ignitability: OK 0-30 ft from the house, CSU score 9.5/10Deer-resistantToxic to dogs
Photos
- Photo 1: (c) Eric Lamb, some rights reserved (CC BY)
- Photo 2: (c) Eric Lamb, some rights reserved (CC BY)
- Photo 3: O. Pichard, Wikimedia Commons (CC-BY-SA)
- Photo 4: Petar Milošević, Wikimedia Commons (CC-BY-SA)
At a glance
Will it survive here?
- Hardiness zones
- USDA 3 to 9
- Water needs
- low water
- Sun
- Best in full sun.
- Soil
- clay, loam, sandy
- Soil pH
- 6.5 to 8.0
- Hail tolerance
- high
- Wind tolerance
- high
- Salt tolerance
- moderate
- Site uses
- Slopes & erosion control
How big, what shape?
- Mature size
- 18 in tall and 18 in wide
- Planting spacing
- ~13 to 18 in apart
What it looks like, and when
- Bloom time
- early summer, mid summer, late summer
- Bloom color
- white
- Bloom length
- Long (several weeks)
- Foliage
- Deciduous
Who else benefits
- Pollinator value
- high
- Deer
- Generally deer-resistant
- Colorado native
- Yes
- Native ecoregion
- shortgrass prairie, foothills
Also worth knowing
- Fire rating
- Low ignitability: OK 0-30 ft from the house, CSU score 9.5/10
Things to know before you plant
- Toxic to dogsConsidered toxic to dogs, so keep pets away from it and check with your vet.
- Spreads aggressivelyRhizomatous; can run 2-3 ft in a single season in moist soil
Planting & establishment
Native perennial; deep-water first season to establish, then minimal water needed.
Frequently asked questions
- Is Common Yarrow good for the Colorado Front Range?
- Yes, Common Yarrow is a well-suited perennial for Colorado's Front Range.
- What should I know before planting Common Yarrow?
- The main things to know: Considered toxic to dogs, so keep pets away from it and check with your vet. Rhizomatous; can run 2-3 ft in a single season in moist soil
- How big does Common Yarrow get?
- It matures to about 18 in tall and 18 in wide.
- How far apart do I plant Common Yarrow?
- Space Common Yarrow about 13 in apart for a faster, fuller bed, or up to 18 in apart for a looser planting.
- Is Common Yarrow hardy on the Front Range?
- Common Yarrow is hardy in USDA 3 to 9. The Colorado Front Range spans roughly USDA 4b to 6a, so it is well within range.
- How much water does Common Yarrow need?
- It needs low water once established.
- Is Common Yarrow safe for dogs?
- No. Common Yarrow is considered toxic to dogs. Keep pets away and check with your vet.
- Is Common Yarrow deer-resistant?
- Common Yarrow is generally considered deer-resistant, though no plant is deer-proof when browse pressure is high.
- Is Common Yarrow a good firewise plant near the house?
- Common Yarrow is rated 9.5 of 10 in CSU Extension Fact Sheet 6.305 (2025), where higher means less ignitable, so it can go within 0 to 5 feet of the house as well as out to 30 feet when kept watered and tidy. This is general guidance based on CSU Extension Fact Sheet 6.305 (2025), not a guarantee that any plant won't burn, a well-irrigated, well-maintained plant is the goal. Follow CSU Extension defensible-space guidance and check with your local fire district before planting in the wildland-urban interface.
- How long does Common Yarrow bloom?
- Common Yarrow blooms for several weeks, a long-season performer on the Front Range. Bloom timing shifts a week or two with elevation and spring weather.
Track Common Yarrow prices
See also
- Front Range plants that are toxic to dogs
- Pollinator perennials for the Front Range
- Colorado native perennials for the Front Range
- Low-water perennials for Colorado's Front Range
- Deer-resistant plants and shrubs for Colorado's Front Range
- Native plants of Colorado for Front Range yards
- Xeriscape plants for Colorado
