Advanced Search Filters

Plant Type
Hardiness Zone
Heat Zone
Sunset Zone
Function
Sun Exposure
Soil Moisture
Water Requirement

Thunbergia gregorii

Image of Thunbergia gregorii

©Dolezal Publishing/John M. Rickard

Family

Acanthaceae

Botanical Name

Thunbergia gregorii

Plant Common Name

Orange Clockvine

General Description

Bearing cheerful flowers and handsome foliage year round, this small twining vine from tropical Africa is an excellent choice for greenhouses, mild-climate gardens, and annual plantings. The singly-borne, clear orange, trumpet shaped flowers have five heart-shaped petals that flare and flop at their tips. Hungry hummingbirds visit the flowers. Bloom often continues year-round where winters are mild; elsewhere it lasts from midsummer to frost. The triangular medium green leaves and slender stems are are hairy. This vine behaves as a herbaceous perennial in the coldest fringes of its hardiness range, dying to the ground but resprouting and flowering the next growing season.

Grow this cold-tender vine in full sun and moist, fertile, well-drained soil. Partial sun is best in hot climates. Use it as a small annual or perennial vine for a trellis, fence, or pillar, or plant it in a hanging basket or other container. It makes a good groundcover in frost-free districts.

Characteristics

  • AHS Heat Zone

    12 - 8

  • USDA Hardiness Zone

    9 - 15

  • Sunset Zone

    H1, H2, 13, 16, 17, 21, 22, 23, 24

  • Plant Type

    Vine/Liana

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    6'-12' / 1.8m - 3.7m

  • Bloom Time

    Summer, Late Summer, Early Fall, Indeterminate

  • Native To

    Eastern Africa, Middle Africa

Growing Conditions

  • Soil pH

    Acidic, Neutral

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Growth Rate

    Very Fast

  • Water Requirements

    Average Water

  • Habit

    Vining/Climbing

  • Seasonal Interest

    Spring, Summer, Fall, Winter

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Orange

  • Foliage Color (Spring)

    Green

  • Foliage Color (Summer)

    Green

  • Foliage Color (Fall)

    Green

  • Foliage Color (Winter)

    Green

  • 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

    Medium

  • Foliage Sheen

    Matte

  • Evergreen

    Yes

  • Showy Bark

    No

Special Characteristics

  • Usage

    Bedding Plant, Container, Foundation, Groundcover, Hanging Basket, Houseplant, Mixed Border, Rock Garden / Wall, Tropical, Vine

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Attracts

    Hummingbirds, Butterflies

  • Self-Sowing

    No