Twin Arnica
Arnica sororia
Last reviewed: June 2026
Light
full sun
Water
low
Size
6"–16" H × 4"–12" W
Bloom
May, Jun, Jul
Native to
CA, ID, MT, NV and 4 more states
Pollinators
bees, butterflies
Browse plants for this ecoregion
Twin arnica is a low-growing perennial wildflower native to mountain regions. It produces bright yellow daisy-like blooms from May through July and forms compact clumps that spread slowly over time. This drought-tolerant plant thrives in full sun conditions with minimal water requirements once established.
In an HOA neighborhood
Twin Arnica takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Appears very wild and informal
- May look sparse or weedy outside bloom period
- Uncommon plant that HOAs might not recognize as intentional landscaping
Wildlife value
The cheerful yellow flowers attract native bees and butterflies during the spring and early summer blooming period. It provides important nectar resources for pollinators.
Common questions
- How much sun does Twin Arnica need?
- Twin Arnica grows best in full sun conditions.
- When does Twin Arnica bloom?
- Twin Arnica blooms in May, June, and July.
- Where is Twin Arnica native?
- Twin Arnica (Arnica sororia) is native to CA, ID, MT, NV and 4 more states, per the USDA PLANTS Database and regional native plant society lists.
- What pollinators does Twin Arnica attract?
- Twin Arnica draws bees and butterflies.
- Is Twin Arnica HOA-friendly?
- Twin Arnica takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Twin Arnica? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz