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Helianthella castanea

Diablo Helianthella

Plant photo of: Helianthella castanea
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Information by: calscape.org        Photographer: Flickr

 

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.

 

Plant Type

Perennial, Herb

Height Range

1-3'

Width Range

Flower Color

Yellow

Flower Season

Summer

Leaf Color

Green

Bark Color

n/a

Fruit Color

n/a

Fruit Season

n/a

Sun

Full

Water

Low

Growth Rate

Moderate

Soil Type

Sandy, Loam, Rocky

Soil Condition

Well-drained, Dry

Soil pH

Neutral

Adverse Factors

n/a

Design Styles

English Cottage, Meadow, Mediterranean, Ranch, Spanish

Accenting Features

Showy Flowers

Seasonal Interest

Summer

Location Uses

Entry, Lawn, Parking Strip, Patio, Park, Parking Lot, Roadside, Walkways, With Rocks

Special Uses

Container, Erosion Control, Mass Planting, Lawn Substitute, Hanging Baskets

Attracts Wildlife

n/a

Water Saving Tip:

Check your irrigation controller once a month, and adjust as necessary.

Most plants require only one-third as much water in winter as they do in summer.