Klamath arnica (Arnica spathulata) is a resilient perennial wildflower with bright yellow, daisy-like flowers, native to western North America.
At-a-glance light, water, soil, and growing conditions from plant data
Full sun to partial shade
50% intensity
Prefers morning sun and afternoon shade in hotter climates.
Keep soil consistently moist
50% intensity
Avoid waterlogged conditions.
Well-drained
50% intensity
Cool to moderate
50% intensity
Prefers cooler temperatures; protect from extreme heat.
Low
25% intensity
Avoid over-fertilizing; a light spring application is usually sufficient.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Edible | No |
The plant contains sesquiterpene lactones which can cause gastrointestinal upset, skin irritation, and other symptoms. Parts of the plant are considered toxic if ingested or if contact is made with skin.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Klamath arnica prefers consistently moist soil but dislikes waterlogged conditions. Water thoroughly when the top 2-3 cm of soil feels dry.
Reduce watering slightly during its dormant period in winter, but never allow the soil to become completely arid. Ensure good drainage to prevent root rot.
Pruning for klamath arnica is minimal. Deadhead spent flowers to encourage more blooms and maintain a tidy appearance. In late fall or early spring, trim back any dead or damaged foliage to the ground.
This promotes vigorous new growth and helps prevent disease. Avoid heavy pruning.
Propagation is typically done by seed sown in late autumn or early spring. Seeds benefit from a period of cold stratification.
Division of established clumps in early spring is another method, ensuring each division has healthy roots and shoots. Transplant divisions carefully to minimize stress.
Arnica spathulata generally does not require frequent repotting, as it prefers to be slightly root-bound. If repotting becomes necessary, typically every 2-3 years, do so in early spring before new growth emerges.
Use a well-draining potting mix and select a pot only slightly larger than the current one.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Klamath Arnica (Arnica spathulata)
Where Klamath Arnica (Arnica spathulata) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Arnica |
| Species | Arnica spathulata |
Similar in genus Arnica
Answers based on plant encyclopedia data
