Orange Clockvine

Thunbergia gregorii | Also known as: Orange clock vine | Rating: 6 votes | Print / Pdf

Thunbergia Gregorii - Didn't it run for Pope around the time of the Borgias?

One of the most striking garden plants to have, Thunbergia gregorii is a deciduous flowering vine that displays curious deep orange flowers in summer. Its triangular, furrowed leaves ensure a firm lush appearance, but it also ensures that the remarkable blossoms stand out dramatically. The saucer-shaped orange flowers have five individual heart-shaped petals, but display no stamens in its centre, simply a darkened hole. Commonly known as the Orange Clockvine, it can quickly coat any surface- be it wall, trellis or even hanging basket. It loves well-drained soils in full sun but it is no fan of cold and may need to be kept under glass over the winter.

Rate it:
Known dangers?
  • no
Height [m]
  • 1 - 1.5
Spread [m]
  • 0.6
Dominant flower colour
  • Orange
Flower Fragrance
  • No, neutral please
Flowering seasons
  • Early summer
  • Mid summer
  • Late summer
Foliage in spring
  • Green
Foliage in summer
  • Green
Foliage in Autumn
  • Green
Foliage in winter
  • Green
Propagation methods
  • semi-ripe cuttings
  • Greenwood cuttings
  • seed
  • layering
Growth habit
  • Climbing
  • Twining
  • Acidic
  • Neutral
  • Alkaline
Hardiness zone
  • Z13-15
Heat zone
  • H12-10
Winter temperatures [°C]
  • 0
Heat days
  • 150 - 210
  • well-drained
  • well-drained but frequently watered
Soil type
  • Clay
  • chalky
  • loams
Sun requirements
  • Full sun
  • Sheltered
Standard category
  • Flowers & bulbs
  • Annuals
Grown for
  • Attractive Flowers
Creative category
  • Fast growing
  • For Beginners
Garden spaces
  • Walls, trellises and pergolas
  • Borders
Gardening expertise
  • beginner
Time to reach full size
  • Less than one year
1 Related plants