Diablo helianthella
Helianthella castanea
Last reviewed: August 2026
Light
full sun
Water
medium
Size
12"–36" H × 12"–18" W
Bloom
Apr, May, Jun
Native to
CA
Pollinators
bees
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 431 programs across 44 states, each with a link to the provider and the date we last checked it.
Find rebates in your areaAn upright perennial sunflower relative with large, rough-textured leaves and bright yellow flower heads held singly on tall stems. It is a rare species restricted to grassland and woodland-edge habitat.
Wildlife value
The showy spring and early summer flowers attract native bees, including specialist sunflower-family visitors.
Common questions
- How much sun does Diablo helianthella need?
- Diablo helianthella grows best in full sun conditions.
- When does Diablo helianthella bloom?
- Diablo helianthella blooms in April, May, and June.
- Where is Diablo helianthella native?
- Diablo helianthella (Helianthella castanea) is native to CA, per the World Checklist of Vascular Plants (Kew).
- What pollinators does Diablo helianthella attract?
- Diablo helianthella draws bees.
Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Diablo helianthella? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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