Plant Wiki

The open plant encyclopedia

Know any plant.
Grow it well.

Snap a photo or search by any name to see how to care for it, where it comes from, whether it's safe, and a 3D model you can turn.

  • 13,000+plants with full pages
  • 365,000+plant species worldwide
  • 220+countries covered

Common in

See all

The plants people record most in your country, and ones that grow there wild.

What do you want to do?

Popular plants

Browse all plants

See them in 3D

All plants in 3D

Browse plants

Filter by what you want to do, shape, origin, country, care and safety.

Plant Wiki › Browse plants

Western mountain aster

Symphyotrichum spathulatum

Also called Western Aster

Western mountain aster
Photo: Jim Morefield, CC BY 4.0

Western mountain aster is a native North American perennial wildflower that spreads by rhizomes to form colonies, blooming with violet petals and yellow centers in July and August. It thrives in cool mountain meadows and open forest, so give it sun, good drainage and moderate water.

Family
Asteraceae (Daisy family)
Grows as
Perennial
Light
Full sun, Part shade
Water
Water regularly while establishing, then reduce to moderate watering once established.
Soil
Well-drained loam or sandy soil; tolerates poor soils.
Temperature
Hardy to cold winters, roughly -30 °C or colder; comfortable in cool summers.
How easy
Easy

About

Symphyotrichum spathulatum (formerly Aster spathulatus) is a species of flowering plant in the family Asteraceae native to western North America including northwestern Mexico. Commonly known as western mountain aster, it is a perennial, herbaceous plant that may reach 20 to 80 centimeters (8 to 31 inches) tall. Its flowers, which open in July and August, have violet ray florets and yellow disk florets.

Where it grows

Symphyotrichum spathulatum is found in the western United States, western Canada, and northwestern Mexico. It is native to British Columbia and Alberta in Canada, and in the United States from Washington state east to Montana, south to New Mexico, west to California, and north again to Oregon. There is no recorded presence in Arizona. In Mexico, it is native to the states bordering the Gulf of California. It grows at 1,200–2,900 meters (3,900–9,500 feet) (or lower) in meadows on mountain slopes and open aspen and coniferous forests.

Other Symphyotrichum plants

Scaleleaf aster · Manyray aster · Anticosti Island aster · Western aster · Symphyotrichum bimater · Northern bog aster · Symphyotrichum bullatum · Symphyotrichum burgessii · Western meadow aster · Carneros Aster · Savanna aster · Symphyotrichum chihuahuense

Text excerpted from the Wikipedia article Symphyotrichum spathulatum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Credits & terms

Identify a plant

Point at a leaf or flower and snap. One plant in frame works best.

Your photo
Starting camera…