General Plant Information (Edit)
Plant Habit: Vine
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Water Preferences: Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 10a -1.1 °C (30 °F) to +1.7 °C (35 °F)
Plant Height: 15 feet - 20 feet or more
Leaves: Evergreen
Fruit: Dehiscent
Flowers: Showy
Flower Color: Blue
Lavender
White
Other: Lavender blue with yellow throat
Bloom Size: 2"-3"
Flower Time: Summer
Late summer or early fall
Other: Blooms appear year round in tropical climates.
Underground structures: Taproot
Suitable Locations: Houseplant
Uses: Suitable as Annual
Wildlife Attractant: Bees
Butterflies
Resistances: Humidity tolerant
Propagation: Other methods: Cuttings: Stem
Division
Containers: Suitable in 3 gallon or larger
Suitable for hanging baskets
Needs excellent drainage in pots
Awards and Recognitions: RHS AGM

Image
Common names
  • Blue Sky Vine
  • Bengal Clock Vine

Photo Gallery
Location: Longwood Gardens, Kennett Square, Pennsylvania
Date: 2021-02-25
Location: San Juan, Puerto Rico
A beautiful lavender-blooming tropical vine.

Date: 2007-06-08
Location: Longwood Gardens, Kennett Square, Pennsylvania
Date: 2021-02-25
Location: Pennsylvania
Date: 2020-11-29
Thunbergia grandiflora
Location: Missouri Botanical Garden in St Louis
Date: 2023-10-16
Location: Costa Rica | Old Photo
Date: 2022-12-17
Location: Longwood Gardens, Kennett Square, Pennsylvania
Date: 2021-02-25
Location: DeLand Florida
Date: 2014-05-14
This pod has grown down as a 2 foot long pendant and has been blo
Location: Daytona Beach, Florida
Date: 2012-10-22
Location: New York Botanical Gardens Bronx NY
Date: 2018-03-03
Location: Botanical Garden, Rio de Janeiro, Brazil
Date: 2014-02-02
Uploaded by wren
Location: Southwest Florida
Date: summer 2008
A rampant vine, but nonetheless very beautiful.
Location: Missouri Botanical Garden in St Louis
Date: 2023-10-16
Location: Daytona Beach, Florida
Date: August 26, 2010
Location: Test  garden 
Date: 2017-02-10
Location: Ocean Springs, MS
Date: September 2011

Date: 2010-10-30
Location: Paraty, Brazil
Date: 2014-01-21
Location: My Garden in DeLand Florida
Date: 2014-05-13
This one has been progressively blooming here since Spring 2013!
Location: Sanford, FL
Date: 2021-05-29
Location: Sanford, FL
Date: 2021-05-30
Looking out of 2nd story window @ vine covering pergola below and

Date: August 2011

Date: Summer 2011
Location: my garden 
Date: 2014-09-02

Photo Courtesy of Secret Garden Growers.
  • Uploaded by Joy
Location: Seville, Spain | April, 2023 
Date: 2023-04-05
Location: Paraty, Brazil
Date: 2014-01-21
Location: Paraty, Brazil
Date: 2014-01-21
Location: La Fortuna, Costa Rica | Old Photo
Date: 2022-12-21
Location: Southwest Florida
Date: summer 2008
Location: Daytona Beach, Florida
Date: 2012-10-22 
Photo taken at Washington Oaks State Park, Palm Coast, Florida
Location: Daytona Beach, Florida
Date: 2012-10-22
Location: Sanford, FL
Date: 2021-05-29
Location: Sanford, FL
Date: 2021-05-29
Location: Ocean Springs, MS
Date: September 2011
Location: Ocean Springs, MS
Date: September 2011
Location: Paraty, Brazil
Date: 2014-01-21
Location: my garden 
Date: 2017-06-29
Location: my garden 
Date: 2017-06-29

Date: March
credit: Prenn
Comments:
  • Posted by stetchworth (Ocean Springs, MS - Zone 8b) on Sep 29, 2011 7:00 PM concerning plant:
    I have mine on an arbor and in the spring it comes up from the ground and is a very fast grower. It starts blooming around July in my area. It is a beautiful shade of blue with a yellow throat. I cut mine back down to the ground in the winter time before the first frost hits and I also mulch it. Comes back every spring.
  • Posted by plantladylin (Sebastian, Florida - Zone 10a) on Sep 19, 2011 5:57 PM concerning plant:
    Thunbergia grandiflora is a twining, flowering perennial vine with leathery elongated heart shaped leaves and flowers in colors of sky blue to light violet. There is also a white flowering variety. This vine is fast growing in the south and a beautiful addition to the garden.
Plant Events from our members
piksihk On June 14, 2021 Cuttings took
piksihk On June 29, 2017 Potted up
Cutting showing new growth
piksihk On May 22, 2017 Miscellaneous Event
Rooting cutting from MG;
Mine died over winter; given Laura rooted plant from mine
piksihk On August 7, 2015 Bloomed
piksihk On May 1, 2015 Bloomed
piksihk On May 18, 2014 Bloomed
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