PlantoscanImage: AI generated
Sky Vine Plant Care
Thunbergia grandiflora Roxb.
Updated · Sources · How we source care data
This plant, with its large trumpet-shaped, sky-blue flowers, originates from India and Myanmar. Thunbergia grandiflora is highly sought after by plant collectors for its stunning blooms and vigorous climbing habit, making it a striking addition to any garden or landscape.
Every 4–7 days
Bright indirect light
65–85°F
50–70%
At a glance
How do you care for Sky Vine?
Water Sky Vine every 4–7 days, letting the top layer of soil dry out between waterings, and give it bright indirect light. It prefers temperatures of 65–85°F (18–29°C) and 50–70% humidity. Fertilize it every 2 months during the growing season.
Where Is the Sky Vine Native To?
What Is the Sky Vine?
Sky Vine (Thunbergia grandiflora) belongs to the Acanthaceae family within the Thunbergia genus. Sky Vine is native to China, India, Nepal, Bangladesh, Indochina and Myanmar and widely naturalised else. Sky Vine is also known as Blue Trumpet Vine, Bengal Clock Vine, Skyflower.
Sky Vine displays a vining, trailing growth habit, reaching up to 30 ft tall with a spread of approximately 6 ft. Sky Vine produces tubular flowers in various colors like yellow, orange, or white.
Leaf size: approximately 5 inches.
How Often Should You Water a Sky Vine?
Thunbergia grandiflora requires watering every 4–7 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 4–7 days
Let soil partially dry between waterings
What Light Does the Sky Vine Need?
Sky Vine thrives in bright indirect light. Avoid placing Sky Vine in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect light
What Temperature and Humidity Does the Sky Vine Prefer?
Thunbergia grandiflora grows best at temperatures of 65–85°F. Sky Vine prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
65–85°F
Humidity
50–70%
What Soil Mix Works Best for a Sky Vine?
Well-draining, fertile soil with added compost for nutrients. Good drainage is essential for Sky Vine to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Sky Vine?
Feed Sky Vine every 2 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 2 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Sky Vine?
Repot annually in spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Sky Vine?
Sky Vine can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to black eyed susan vine plant care, which shares the same genus.
Is the Sky Vine Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Sky Vine, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Sky Vine?
Sky Vine is susceptible to aphids, spider mites, whiteflies. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Sky Vine Need?
Sky Vine grows outdoors in USDA Zone 9b – 13b. It survives winters down to planting zone 9b. Sky Vine is native to China, India, Nepal, Bangladesh, Indochina and Myanmar and widely naturalised else. In cooler regions, grow Sky Vine as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 9b – 13b
Keep exploring plants
Sky Vine is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Thunbergia genus — compare its care with other Thunbergia species on PlantoScan.
Thunbergia is part of the Acanthaceae plant family — browse all Acanthaceae genera and species.
Sky Vine thrives in bright light and direct sun — see other bright-light plants.
More Thunbergia Species
Other Thunbergia species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Thunbergia grandiflora Roxb., family Acanthaceae (first published in Bot. Reg. 6: 6 (1820)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Sky Vine, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: AI-generated illustration (labelled on the image).
- Hardiness zone: USDA Zone 9b – 13b, estimated from the plant's typical growing conditions.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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