Asteraceae
Mountain agoseris
Agoseris aurantiaca
Also known as Orange agoseris, Troximon aurantiacum, False dandelion, Mountain dandelion
Flowering Plants · Native Plants · Alpine Wildflower · Asteraceae · Orange Flowers · Rock Garden · Mountain Native · Western North America · Dandelion-Like · Pollinator · Perennial
Mountain agoseris is a charming alpine wildflower native to high-elevation meadows across western North America, producing distinctive orange dandelion-like blooms. It prefers cool temperatures, moderate moisture, and gritty, well-draining soil that mimics its mountain habitat. Best suited for rock gardens or native plant landscapes, it requires minimal care once established but does not tolerate heat or humidity well.
Growing conditions
The details behind the basics
- Daily light
- 5 hours
- Watering
- Water moderately, allowing the top inch of soil to dry between waterings · Every 7-10 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 6.6–7.5
- Temperature
- -25°F to 95°F
- Cycle
- Perennial
- Propagation
- Seed
Hardiness
USDA 4b-9b
Form & growth
Mature size and habit
- Mature height
- 20 ft – 40 ft
- Spread
- 20 ft
- Spacing
- 12 in apart
- Growth rate
- Fast
- Root depth
- Medium
- Flowers
- Orange
- Foliage
- Green · Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Alaska, Alberta, Arizona, British Columbia, California, Colorado, Idaho, Montana, Nevada, New Mexico, Northwest Territorie, Oregon, QuéBec, South Dakota, Utah, Washington, Wyoming, Yukon
- Attracts
- Bees, Butterflies
Sources: trefle, usda
More Agoseris
Related plants from the same genus
Agoseris glauca var. glauca
Agoseris glauca var. glauca
Partial Sun · Moderate · Fast
Agoseris glauca var. dasycephala
Agoseris glauca var. dasycephala
Partial Sun · Moderate · Fast
Prairie agoseris
Agoseris glauca
Partial Sun · Moderate · Fast
Agoseris aurantiaca var. purpurea
Agoseris aurantiaca var. purpurea
Partial Sun · Moderate · Fast
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