trefle.io · Taken Jul 5, 2021 by David Dodge (cc-by-sa)
Asteraceae
Heart-leaf arnica
Arnica cordifolia
Also known as Arnica cordifolia var. humilis, Arnica cordifolia subsp. whitneyi, Arnica cordifolia subsp. genuina, Arnica cordifolia var. cordifolia
Flowering Plants · Edibles & Herbs · Native Plants · Heart-Leaf Arnica · Mountain Wildflower · Medicinal Herb · Native Plant · Woodland Garden · Yellow Flowers · Alpine · Western North America · Daisy Family · Perennial
Heart-leaf arnica is a charming mountain wildflower native to western North America that produces cheerful yellow daisy-like blooms in spring and early summer. It prefers cool, well-drained soils and partial shade, mimicking its natural montane forest habitat, and benefits from consistent moisture during the growing season. Widely known for its medicinal properties, it makes a beautiful and meaningful addition to native or woodland gardens.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Water moderately to keep soil evenly moist but never waterlogged; reduce frequency in cooler months · Every 7-10 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 6–8
- Temperature
- -40°F to 85°F
- Cycle
- Perennial
- Propagation
- Seed
Hardiness
USDA 3a-8b
Form & growth
Mature size and habit
- Mature height
- 12 in – 2 ft
- Spread
- 18 in
- Spacing
- 18 in apart
- Growth rate
- Fast
- Root depth
- Medium
- Flowers
- Yellow
- Foliage
- Green · Coarse
Ecology & origin
Where it belongs and what it brings
- Native to
- Alberta, Arizona, British Columbia, California, Colorado, Idaho, Manitoba, Michigan, Montana, Nevada, New Mexico, Northwest Territorie, Ontario, Oregon, Saskatchewan, South Dakota, Utah, Washington, Wyoming, Yukon
- Attracts
- Bees, Butterflies, Moths
Sources: trefle, usda
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