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Plant Profile

Thunbergia grandiflora (Bengal Clock Vine, Sky Vine)

From early summer until late winter this vigorously twining vine bears hanging clusters of large, lavender-blue flowers that are 3 inches in diameter These flowers are bell-shaped and have a white throat. The broad, heart-shaped leaves of the Sky Flower are soft and dark green.Sky Flower has a very rampant growth habit and is great for the quick covering of arbors, trellises and fences. It can be successfully used as a screen or container plant and is marvelous cascading over a wall.

  • Landscape Information
  • Botanical Description
  • Horticulture Management
  • By Philipp Weigell (picture taken by Philipp Weigell) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
  • By HPNadig (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
  • By Johnny Wee [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
  • By Philipp Weigell (picture taken by Philipp Weigell) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
  • Forest & Kim Starr [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
By Philipp Weigell (picture taken by Philipp Weigell) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons

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  • French Name: Liane de Chine, Liane mauve

    Pronunciation: thun-BER-jee-uh gran-diff-FLOR-ruh

  • Origin: India

  • Heat Zones: 10 to 15

    Hardiness Zones: 10 to 13

  • Uses: Espalier, Container, Trellis, Green Wall

  • Size/Shape

    Growth Rate: Fast

    Tree Shape: Spreading

    Canopy Symmetry: Irregular

    Canopy Density: Medium

    Canopy Texture: Medium

    Height at Maturity: 8 to 15 m

    Spread at Maturity: 1.5 to 3 meters

    Time to Ultimate Height: 5 to 10 Years

  • By Philipp Weigell (picture taken by Philipp Weigell) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
  • By HPNadig (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
  • By Johnny Wee [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
  • By Philipp Weigell (picture taken by Philipp Weigell) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
  • Forest & Kim Starr [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
By Philipp Weigell (picture taken by Philipp Weigell) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons

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  • Foliage

    Leaf Arrangement : Opposite

    Leaf Venation: Pinnate

    Leaf Persistance: Evergreen

    Leaf Type: Simple

    Leaf Blade: Less than 5

    Leaf Shape: Ovate

    Leaf Margins: Undulate

    Leaf Texture: Leathery

    Leaf Scent: No Fragance

    Color(growing season): Green

    Color(changing season): Green

  • Flower

    Flower Showiness: Yes

    Flower Size Range: 1.5 - 3

    Flower Type: Raceme

    Flower Sexuality: Monoecious (Bisexual)

    Flower Scent: No Fragance

    Flower Color: Purple

    Seasons: Spring, Summer

  • Trunk

    Trunk Susceptibility to Breakage: Generally resists breakage

    Number of Trunks: Single Trunk

    Trunk esthetic Values: Not Showy

  • Fruit

    Fruit Type: Capsule

    Fruit Size Range: 1.5 - 3

    Fruit Color: Brown

    Seasons: Spring, Summer

  • By Philipp Weigell (picture taken by Philipp Weigell) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
  • By HPNadig (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
  • By Johnny Wee [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
  • By Philipp Weigell (picture taken by Philipp Weigell) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
  • Forest & Kim Starr [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
By Philipp Weigell (picture taken by Philipp Weigell) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons

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  • Tolerance

    Frost Tolerant: No

    Heat Tolerance: Yes

    Drought Tolerance: No

    Salt Tolerance: Poor

  • Requirements

    Soil Requirements: Loam, Sand

    Soil Ph Requirements: Acidic, Neutral

    Water Requirements: Moderate

    Light Requirements: Part

  • Management

    Toxicity: No

    Invasive Potential: Yes

    Susceptibility to Pests and Diseases: Yes

    Pruning Requirements: Little needed, to develop a strong structure

    Surface Rooting: No

    Life Span: Less than 25

    Edible Parts: None

    Pests: Whitefly

    Plant Propagation: Cutting, Layering

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