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How to Grow Thunbergia

By Alicia Bodine ; Updated September 21, 2017
Thunbergia grandiflora flowers resemble morning glories.
thunbergia grandiflora image by Kerry from Fotolia.com

Thunbergia grandiflora is a flowering vine native to India often referred to as the blue trumpet vine or sky vine. It grows hardy in USDA zones 8 through 11. The leaves of the thunbergia are heart-shaped and either sky blue or light violet in color. Most thunbergia vines are grown in containers. If you plan to add a thunbergia grandiflora to your landscape, you will need to learn how to properly care for it.

Find a location to plant your thunbergia. It should be a spot that has a good amount of sun with some partial shade. At least 6 hours of sunlight each day is ideal.

Decide if you are going to plant your thunbergia in the ground or in a pot. If you use a container, a well-draining potting soil is best. According to Florida State University, thunbergia grandiflora can grow in acidic or alkaline soils so long as they drain well, so you don't need to perform a pH test.

Water the thunbergia grandiflora often. This vine thrives in moist soil, so do not let the soil dry out.

Fertilize the thunbergia grandiflora with a 10-30-10 fertilizer. Green Patio recommends that you dilute your fertilizer to half strength. Apply the fertilizer once every two weeks.

Prune the thunbergia grandiflora to keep it within the boundaries of its container. If you are allowing it to grow freely outdoors, you may want to prune it if it is getting too close to any of your other plants or trees.


Things You Will Need

  • Well-draining soil
  • Fertilizer
  • Pruning shears


  • You can use both the leaves and the blooms of the thunbergia grandiflora in flower arrangements.


  • Your thunbergia grandiflora vine will grow fast once it has been established. If it is growing wild, it could quickly cover a wall or fence.

About the Author


Alicia Bodine has been a professional writer for 13 years. She has produced thousands of articles for online publications such as Demand Studios, GoBankingRates and WiseGeek. Bodine is passionate about gardening, travel, education and finance. She has received awards for being a top content producer.