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    • Photo of Hibiscus trionum flower by Annie's Annuals & Perennials

    Photo by Annie's Annuals & Perennials

    Used with permission, all rights reserved.

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    Hibiscus trionum

    Also Known As

    • Hibiscus trionum 'Bladder Ketmia'
    • Bladder Ketmia
    • Flower Of An Hour
    • Flower-of-an-Hour
    • Venice Mallow

    Plant type

    perennial

    size

    • H: 20"
    • W: 12"

    planting zones

    • 9a-10b

    More Options

    Hibiscus trionum plant details

    Hibiscus trionum is a broadleaf deciduous perennial with green foliage. In summer chocolate and yellow flowers emerge. Attracts bees and beneficial insects making it an excellent addition to pollinator gardens. Grows well with sun and even moisture - regular water. Adapts to various soil conditions. Does well in average, rich and well-drained soil. A good option if you're seeking something heat tolerant.

    CHARACTERISTICS OF Hibiscus trionum

    Plant type: perennial
    Plant family: malvaceae
    Foliage: deciduous green
    Mature size: 12 IN wide, 20 IN tall
    Flowers: chocolate and yellow blooms in summer
    Uses: border plant, cottage garden, self-sowing, showy

    GROWING CONDITIONS for Hibiscus trionum

    USDA Zones: 9a - 10b
    Sun exposure: sun
    Watering frequency: even moisture - regular
    Resistant to: heat
    Soil needs: average, rich and well-drained

    Nursery contributed plant descriptions

    Bushy branching compact plants blooming all summer with chocolate centered silvery yellow 2" hibiscus flowers. Grows to 14" in sunny location, hardy in zones 10-12, grown as an annual in colder locations. Usually will reseed itself.

    By: Accents for Home and Garden

    In Annuals for Connoisseurs, the author, Wayne Winterrowd writes: “Once most gardeners have grown Hibiscus trionum they find they never want to be without it. . . as it works magic on the gardener’s heart.” Lovely, chocolate centered, silvery yellow, 2” flowers are borne all Summer on this extremely easy to grow, many branched plant which will form a PERENNIAL shrub 20” x 12” by the Bay. THRIVES IN ANY SOIL. Due to Agricultural Restrictions we cannot ship this plant to Colorado.

    By: Annie's Annuals & Perennials

    Gardening facts about Hibiscus trionum plant

    How to Grow Hibiscus trionum

    • Sun Exposure

      • sun

    • Water Needs

      • even moisture - regular

    • Soil Needs

      • adaptable
      • average
      • well-drained
      • rich

    • Special Situation

      • heat tolerant

    Features

    • Foliage Color

      • green

    • Flower Color

      • yellow
      • chocolate

    • Wildlife

      • beneficial insects
      • bees

    • Flower Season

      • summer

    • Foliage Season

      • deciduous

    See other plant types of Hibiscus for your garden

    Hibiscus 'Tosca'

    aka Hibiscus mutabilis x syriacus 'Tosca', Tosca Rose of Sharon

    Plant Type

    Tree, Shrub

    Zones

    6a-9b

    Size

    Height: 4'-12'

    Width: 3'-4'

    • sun - mostly shade
    • even moisture
    Photo of Hibiscus 'Tosca' flower by Hoot Owl Hollow Nursery
    View Plant

    More Options

    Hibiscus schizopetalus

    aka Hibiscus schizopetalus 'Japanese Lantern', Coral Hibiscus, Fringed Hibiscus, Japanese Lantern, Japanese Lantern Hibiscus

    Plant Type

    Shrub

    Zones

    10a-12

    Size

    Height: 6'-8'

    Width: 5'-6'

    • sun
    • even moisture - regular
    Photo of Hibiscus schizopetalus flower by Ziqqy J
    View Plant

    More Options

    Hibiscus tiliaceus [variegated]

    aka Hibiscus tiliaceus 'Variegatus', Hibiscus tiliaceus tricolor, Talipariti tiliaceum 'Albo-Variegatus', Mahoe Sea Hibiscus, Sea Hibiscus, Tricolor Hibiscus, Variegated Beach Hibiscus, Variegated Mahoe

    Plant Type

    Shrub

    Zones

    10a-11

    Size

    Height: 8'

    Width: 8'

    • sun - mostly shade
    • even moisture
    Photo of Hibiscus tiliaceus [variegated] foliage by Almost Eden
    View Plant

    More Options

    Hibiscus denudatus

    aka Paleface, Rock Hibiscus

    Plant Type

    Shrub

    Zones

    9a-10b

    Size

    Height: 1'-3'

    Width: 1'-3'

    • sun
    • even moisture
    Photo of Hibiscus denudatus by Stan Shebs
    View Plant

    Abelmoschus moschatus ssp. tuberosus

    aka Abelmoschus moschatus var. tuberosus, Hibiscus abelmoschus, Hibiscus rhodopetalus, Hibiscus sagittaefolius, Hibiscus subnudus, Climbing hibiscus, Musk mallow

    Plant Type

    Perennial

    Zones

    9a-12

    Size

    Height: 1'-6'

    Width: 3'-6'

    • sun - mostly sun
    • regular - drought tolerant
    • dry when dormant
    Photo of Abelmoschus moschatus ssp. tuberosus flower by Peter Richardson
    View Plant
    +220 more Hibiscus
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