Helianthella castanea
Diablo Helianthella
Description
The perennial herb Helianthella castanea is a rare plant endemic to California, and is only found in the San Francisco Bay Area, mostly in and around Mount Diablo State Park. Its common names include Mount Diablo helianthella, Mount Diablo sunflower, and Diablo rockrose. A member of the daisy and sunflower family, the flowers are bright yellow and daisy-like, with ridged petals. The plant grows in clumps of green foliage and sends up flowers on long stems. It can reach 1.5' tall. It does best in full sun with well draining soil.
Sun
Full
Water
Low
Growth Rate
Moderate
Soil Type
Sandy, Loam, Rocky
Soil Condition
Well-drained, Dry
Soil pH
Neutral
Adverse Factors
n/a
Water Saving Tip:
Dig-up patches of weeds and undesirable grasses from turf areas.
Use water to grow the turf you want, not the weeds you don't want! Once you have eliminated what you don't want, add sod or over-seed to repair the bare areas.