Bengal Trumpet
Thunbergia grandiflora
Family: Acanthaceae
Bengal Trumpet (Thunbergia grandiflora) is a upright houseplant from the Acanthaceae family. Non-toxic to pets. Easy to care for and forgiving.
Complete Care Guide
Light Requirements
Thrives near east-facing windows or a few feet back from south/west windows. Needs consistent but not intense light.
Watering
Water when the top 1-2 inches of soil feel dry. Consistent moisture is preferred but brief dry periods are tolerated.
Typical schedule: every 7 days (adjust for season and environment).
Humidity
This plant loves moisture in the air. Keep humidity above 50-60% using a humidifier, pebble tray, or by grouping plants together. Bathrooms with natural light are often ideal.
Temperature
Keep between 60–80°F (16–27°C). Avoid cold drafts, heating vents, and sudden temperature changes.
Size & Growth
Mature size: approximately 36 inches tall × 24 inches wide. Growth rate is fast. Habit: upright.
Difficulty Level: 2/5
Easy to moderate care. Forgiving of minor mistakes but benefits from consistent attention. Good for beginners ready for a small step up.
Quick Tips
- ✓Water approximately every 5 days
- ✓Prefers medium light conditions
- ✓Humidity preference: high
- ✓Keep between 60-80°F
Common Problems & Solutions
Brown leaf tips
Cause: Low humidity, inconsistent watering, or mineral buildup from tap water
Fix: Increase humidity with a pebble tray or humidifier. Use filtered water. Water on a consistent schedule.
Scorched or bleached leaves
Cause: Too much direct sunlight burning the foliage
Fix: Move away from direct sun. This plant prefers filtered or indirect light.
Drooping or wilting
Cause: Usually underwatering or sudden temperature change
Fix: Water thoroughly and ensure consistent moisture. Avoid cold drafts and heating vents.
Crispy leaf edges
Cause: Humidity too low for this tropical plant
Fix: Group plants together, use a humidifier, or place on a pebble tray. Bathrooms often provide ideal humidity.
Pet Safe
Bengal Trumpet is non-toxic and safe for households with cats and dogs. Verified against the ASPCA Toxic and Non-Toxic Plant Database.
Frequently Asked Questions
Is Bengal Trumpet safe for cats and dogs?▼
Yes! Bengal Trumpet is non-toxic to both cats and dogs according to the ASPCA. Safe to keep in homes with pets.
How often should I water Bengal Trumpet?▼
Water approximately every 7 days, but always check the soil first. Water when the top 1-2 inches of soil feel dry. Consistent moisture is preferred but brief dry periods are tolerated. Adjust frequency based on season — less in winter, more in summer.
How much light does Bengal Trumpet need?▼
Bengal Trumpet prefers medium light conditions. Thrives near east-facing windows or a few feet back from south/west windows. Needs consistent but not intense light.
How big does Bengal Trumpet get?▼
Indoors, Bengal Trumpet typically reaches about 36 inches (91 cm) tall with a spread of around 24 inches. Growth rate is fast. Size depends on pot size, light, and care.
Is Bengal Trumpet good for beginners?▼
Yes! With a difficulty rating of 2/5, Bengal Trumpet is very forgiving and suitable for beginners. It tolerates imperfect conditions and bounces back from mistakes.
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