Yarrow is one of the few common garden flowers that is native to North America and also native to Europe and Asia.1Organic Seed Alliance. Yarrow: A Plant Profile and Seed Historian Report European yarrow also arrived with colonists and spread, so the continent now holds both wild native yarrow and introduced yarrow.2Missouri Botanical Garden. Plant Finder – Achillea millefolium The honest answer is yes, with the catch that the plant in front of you may not be the native kind.
Native and Introduced Yarrow Share One Name
Botanists treat common yarrow as a single species with several types inside it. Its scientific name, Achillea millefolium, covers several varieties: plants of one species that differ by origin and by small traits. Some of those varieties are North American natives and some are not.3Lady Bird Johnson Wildflower Center. Achillea millefolium In North America, the species is a mix of native plants, introduced plants, and hybrids between them.4Lady Bird Johnson Wildflower Center. Achillea millefolium
That is how one plant can be native and introduced at once. A species can span continents, with separate wild populations on each. Native status depends on where a plant’s ancestors grew before European settlement, not on the species name.
Two native types cover most of the continent. The most common one, often sold as western yarrow, grows wild across Canada and the northern United States.5USDA Natural Resources Conservation Service. Plant Guide for common yarrow A second native type grows along the Pacific coast, from southern California north to Alaska and the Aleutian Islands.6Canadian Journal of Botany. ACHILLEA MILLEFOLIUM COMPLEX IN CANADA AND PORTIONS OF THE UNITED STATES Together they make common yarrow one of the most widespread native wildflowers in the western United States.7USDA Natural Resources Conservation Service. Plant Guide for common yarrow
The introduced type came from Europe and Asia and was brought to America in colonial times.8Missouri Botanical Garden. Plant Finder – Achillea millefolium It naturalized across the U.S., mainly along roadsides, fields, waste ground, and lawns.9Missouri Botanical Garden. Plant Finder – Achillea millefolium In Canada it was recorded as only sparingly introduced, mostly on the Atlantic coast in places such as Newfoundland and Nova Scotia.10Canadian Journal of Botany. ACHILLEA MILLEFOLIUM COMPLEX IN CANADA AND PORTIONS OF THE UNITED STATES It is practically identical to the most common native type.11USDA Natural Resources Conservation Service. Plant Guide for common yarrow
Where the two meet, they can cross, and their offspring carry a mix of both backgrounds. Decades of mixing make old roadside or lawn stands hard to classify.
The variety label matters when you shop. A variety is a naturally occurring subgroup within a species, which is different from a named plant bred or selected by a nursery. A tag that names only the species does not say which variety is in the pot.
Why You Can’t Tell by Looking
The native and introduced types are so alike that even botanists struggle to map yarrow’s true native range.12USDA Natural Resources Conservation Service. Plant Guide for common yarrow The main difference may be in chromosome number rather than appearance.13USDA Natural Resources Conservation Service. Western Yarrow: A Native Forb for Conservation Use in Montana and Wyoming Native plants mostly carry four sets of chromosomes, while introduced ones mostly carry six.14USDA Natural Resources Conservation Service. Western Yarrow: A Native Forb for Conservation Use in Montana and Wyoming The Pacific coast native also carries six sets, so chromosome count alone doesn’t settle it everywhere.15Canadian Journal of Botany. ACHILLEA MILLEFOLIUM COMPLEX IN CANADA AND PORTIONS OF THE UNITED STATES No home check is reliable.
Several common hunches don’t work. White flowers prove nothing, since both types bloom white. Pink, red, and yellow garden yarrows are usually cultivated forms or related species, so a bright color hints at a garden origin. Location offers better clues: a remote wild meadow is likelier to hold native plants than a lawn or roadside. Plant habit and leaf fuzziness shift with growing conditions, so they don’t reveal origin. Scent varies by place, genetics, and hybridization, so it is not a usable test either.16PubMed Central. Composition and Biological Activity of the Essential Oils from Wild Horsemint, Yarrow, and Yampah from Subalpine Meadows in Southwestern Montana: Immunomodulatory Activity of Dillapiole
If yarrow is already in your yard, you can’t confirm where it came from without testing. Plants that look like wild stock and sit in natural areas are more likely native, while garden-bought plants with fancy colors are probably not the wild native. Either way, removing it is rarely necessary.
A nursery tag can’t settle the question either, since a seller can’t confirm origin by eye. The only dependable evidence is a record of where the original seed or plant came from.
Native Yarrow Adapts to Local Places
Yarrow forms differ by habitat. In coastal California, four-set yarrow grows in moist grassland while six-set yarrow grows on dry dunes.17PubMed Central. Polyploidy and ecological adaptation in wild yarrow
Climate shapes them too. Over a century, yarrow from warm coastal and mountain sites in California grew taller, while yarrow from dry lowlands grew shorter.18bioRxiv. Ongoing local adaptation to climate change in yarrow (Achillea millefolium L.) Nine of ten populations persisted, but the one possibly lost was at the hottest, driest site.19bioRxiv. Ongoing local adaptation to climate change in yarrow (Achillea millefolium L.)
This is why local seed is the better choice. Plants from nearby wild stock already match your rainfall and temperature, while seed from a distant region may grow too tall or struggle in heat. Restoration projects often specify seed from the same region. When you buy, ask sellers for the seed’s collection area.
Yarrow’s Role in Native Gardens and Restoration
Western yarrow is an early colonizer that readily establishes on disturbed sites.20USDA Natural Resources Conservation Service. Western Yarrow Plant Fact Sheet That is why it is recommended in native seed mixes for rangelands, mine sites, roadsides, parks, and prairie reconstruction.21USDA Natural Resources Conservation Service. Western Yarrow Plant Fact Sheet Planting yarrow as sod for erosion control has also worked satisfactorily.22USDA Natural Resources Conservation Service. Western Yarrow
Its pollinator value is modest. In sagebrush steppe, yarrow attracted the fewest bees of the wildflowers compared, and those were mostly species less important to other flowers.23Natural Areas Journal. Floral Guilds of Bees in Sagebrush Steppe: Comparing Bee Usage of Wildflowers Available for Postfire Restoration That comes from one kind of landscape, so it is a caution about expectations, not proof that yarrow has no wildlife value. Don’t rely on yarrow as the main bee food.
In a pollinator planting, combine yarrow with other native flowers known to draw more bees. Let it fill gaps and hold soil while slower plants establish. Its flat flower clusters still host small insects such as flies and small wasps.
Using Yarrow as a Lawn Alternative
Yarrow suits lawn mixes because it is dark green, spreads by underground stems, tolerates moderate foot traffic, and resists drought.24Oregon State University Extension Service. Low Maintenance Turf? It also mixes well with turfgrasses.25Oregon State University Extension Service. Low Maintenance Turf? In summer it stays green longer than clover and blends with most grasses.26Oregon State University Extension Service. Low Maintenance Turf? With regular mowing it rarely flowers.27Oregon State University Extension Service. Low Maintenance Turf?
To start it in a thin lawn, overseed bare or thin patches with yarrow seed in spring or fall, when the ground is moist and mild. Spread the seed evenly over loosened soil so it makes contact and sprouts. Water regularly until seedlings establish, then cut back, since established plants tolerate drought. Because it spreads, edge your garden beds.
Regular mowing keeps yarrow low and leafy, so it blends with the grass. Mowing less often lets it grow taller and bloom, giving a meadow look.
Most lawn seed yarrow isn’t labeled by origin. Native-seed suppliers can provide western yarrow for lawns. In a mowed lawn, origin matters less than in a wild meadow.
How to Buy Native Yarrow
The native type is often sold as western yarrow. But since native and introduced yarrow look identical, a label is only as good as the seller’s sourcing. Buy from native-plant nurseries or seed companies that list the collection region.
On the label itself, look for “western yarrow” or the native variety name lanulosa, which suggest native stock, though only the seller’s sourcing confirms it. “Common yarrow” on its own says nothing about where the plant came from. Named, colored cultivars are bred garden forms, not wild stock, so skip them if native planting is the goal. Ask the seller whether the seed came from wild North American plants.
State native plant societies list reputable growers, and local conservation districts often sell regional seed mixes. Botanical garden plant sales usually note origin, and extension offices can point to regional suppliers.
You can also collect seed yourself, but only from established wild meadows and with permission. Avoid roadside stands, which are likelier to be introduced. Gather dry seed heads in late summer or fall, then sow outdoors in fall or spring.