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HIBISCUS rosa-sinensis 'Agnes Gault'

Image of Hibiscus rosa-sinensis 'Agnes Gault'

Nancy Engel

Family

Malvaceae

Botanical Name

HIBISCUS rosa-sinensis 'Agnes Gault'

Plant Common Name

Agnes Gault Tropical Hibiscus, Queen-of-the-tropics., Tropical Hibiscus

General Description

The tropical hibiscus 'Agnes Gault' has large, rosy pink flowers with a crepe paper texture. The slightly ruffled petals become a vibrant red or red-pink at their bases. Hibiscus rosa-sinensis is an evergreen shrub that originates from China, and 'Agnes Gault' is a hybrid derived from the cross of a cultivated variety with a white flowering Hawaiian hibiscus. This medium sized tropical hibiscus is vigorous, with red young stems, and blooms nicely over an extended period of time.

The broad glossy leaves of 'Agnes Gault' are dark green and oval or heart-shaped. Its flowers are large, radial and broad, and slightly fluted. In the cardinal red center of each is a short red floral tube lined with a bottlebrush of yellow anthers and orange-red stigmas, adding additional floral drama.

Tropical hibiscus is heat tolerant, excelling in full to partial sun and acidic to neutral, fertile soil with good drainage. Very poor and alkaline soils lead to nutrient deficiencies. Remove spent flowers' developing green seed capsules to promote continual production of new blossoms. Tropical hibiscus is a garden staple in both tropical and temperate landscapes. This vibrant cultivar can be grown in sunny mixed borders, along foundations or in large containers that can be moved indoors to overwinter if needed. The short floral stem petioles can be cut and placed in water to enjoy the open flower for one day.

Characteristics

  • AHS Heat Zone

    12 - 1

  • USDA Hardiness Zone

    10 - 15

  • Sunset Zone

    H1, H2, 9, 12, 13, 14, 15, 16, 19, 20, 21, 22, 23, 24

  • Plant Type

    Shrub

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    5'-8' / 1.5m - 2.4m

  • Width

    3'-6' / 0.9m - 1.8m

  • Bloom Time

    Indeterminate

  • Native To

    Hybrid Origin, China

Growing Conditions

  • Soil pH

    Acidic, Neutral

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Growth Rate

    Fast

  • Water Requirements

    Average Water

  • Habit

    Oval/Rounded

  • Seasonal Interest

    Spring, Summer, Fall, Winter

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Red, Pink, Rose

  • Flower Color Modifier

    Bicolor

  • Fruit Color

    Green

  • Foliage Color (Spring)

    Green, Dark Green

  • Foliage Color (Summer)

    Green, Dark Green

  • Foliage Color (Fall)

    Green, Dark Green

  • Foliage Color (Winter)

    Green, Dark Green

  • Bark Color

    Sandy Brown, Gray

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    Yes

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    No

  • Foliage Texture

    Coarse

  • Foliage Sheen

    Glossy

  • Evergreen

    Yes

  • Showy Bark

    No

Special Characteristics

  • Bark Texture

    Smooth

  • Usage

    Container, Feature Plant, Foundation, Houseplant, Mixed Border, Tropical

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Attracts

    Butterflies

  • Self-Sowing

    No