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    • Photo of Helianthella castanea flower by J.G. in SF

    Photo by J.G. in SF

    Used with permission, all rights reserved

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    Helianthella castanea

    Also Known As

    • Diablo Rockrose
    • Mount Diablo
    • Mount Diablo sunflower

    Plant type

    perennial

    size

    • H: 12"-18"
    • W: 12"-24"

    planting zones

    • 9a-9b

    Helianthella castanea plant details

    Helianthella castanea is a broadleaf semi-evergreen perennial with green foliage. In spring and summer yellow flowers emerge. Grows well with sun and regular water. Does well in average and well-drained soil.

    CHARACTERISTICS OF Helianthella castanea

    Plant type: perennial
    Plant family: asteraceae
    Foliage: semi-evergreen green
    Mature size: 12 IN - 24 IN - wide, 12 IN - 18 IN - tall
    Flowers: yellow blooms in spring and summer

    GROWING CONDITIONS for Helianthella castanea

    USDA Zones: 9a - 9b
    Sun exposure: sun
    Watering frequency: regular
    Soil needs: average and well-drained

    Gardening facts about Helianthella castanea plant

    How to Grow Helianthella castanea

    • Sun Exposure

      • sun

    • Water Needs

      • regular

    • Soil Needs

      • average
      • well-drained

    Features

    • Foliage Color

      • green

    • Flower Color

      • yellow

    • Flower Season

      • spring
      • summer

    • Foliage Season

      • semi-evergreen

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