Asteraceae
Arnica griscomii subsp. griscomii
Arnica griscomii subsp. griscomii
Also known as Arnica sancti-laurentii, Arnica snyderi, Arnica brevifolia, Arnica louiseana var. illiamnae
Flowering Plants · Edibles & Herbs · Native Plants · Arnica · Rare · Subarctic · Alpine · Perennial · Medicinal · Canada Native · Wildflower · Asteraceae · Collector Plant
Griscom's arnica is a rare subarctic perennial native to Newfoundland and Québec, requiring cool temperatures, consistently moist acidic soils, and partial shade to thrive. It is best suited for rock gardens or alpine-style plantings and does not tolerate heat or drought. This species has ethnobotanical and medicinal associations within the arnica genus and is a specialist collector's plant.
Growing conditions
The details behind the basics
- Daily light
- 3 hours
- Watering
- Water consistently to keep soil evenly moist but never waterlogged · Every 7-10 days
- Maintenance
- High
- Soil
- loam
- Soil pH
- 5.5–7.5
- Temperature
- -10°F to 85°F
- Cycle
- Perennial
Hardiness
USDA 5a-9b
Form & growth
Mature size and habit
- Mature height
- 18 in – 3 ft
- Spread
- 2 ft
- Spacing
- 12 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Coarse
Ecology & origin
Where it belongs and what it brings
- Native to
- Newfoundland, QuéBec
- Attracts
- Bees, Butterflies
Sources: trefle, usda
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