Indian trumpet tree
oroxylum indicum
Also known as: ["Trumpet tree","Sky-flower tree","Bignonia tree"]
Overview
A deciduous tree native to tropical Asia, known for its large, showy, trumpet-shaped flowers that bloom at night and hang in clusters.
Benefits & Perks
["fragrant flowers","wildlife attractant (bees, butterflies, birds)","fast growing"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Lamiales |
| Family: | Bignoniaceae |
| Genus: | Oroxylum |
| Botanical Name: | Oroxylum indicum |
Plant Characteristics
Basic Information
- Category: Trees
- Suitable Location: outdoor garden in tropical or subtropical regions
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"15–35°C"}
- Hardiness: {"zones":"9–11"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, loamy soil with added organic matter; cactus or succulent mix is suitable.
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: moderate
- Pruning Frequency: Annually in late winter or early spring before new growth begins.
- Pruning Intensity: Moderate; remove up to one-third of old growth to rejuvenate the plant.
Care Details
Ideal Sunlight Coverage:
Full sun to partial shade; 6–8 hours of direct sunlight daily, with some afternoon shade in hot climates.
Sunlight Tolerance Tips:
Acclimate gradually to intense sunlight; protect from harsh afternoon sun to prevent scorching; adjust placement based on indoor/outdoor conditions.
Care Requirements
Care Difficulty
moderatemoderate
Sunlight
full sun to partial shade
Rotate plant for even light exposure; use sheer curtains to filter intense sun; monitor for leaf burn.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly until it drains from the bottom; allow soil to dry between waterings; avoid overwatering.
Soil
well-draining, loamy soil with organic matter
pH: Slightly acidic to neutral, pH 6.0–7.0.
Use a mix with good drainage; avoid heavy clay soils; check moisture before watering.
Temperature
Prefers warm temperatures, 65–85°F (18–29°C); tolerates brief periods of cooler temperatures but thrives in warmth.
Protect from frost; ensure good air circulation; adjust watering for temperature changes.
Fertilizing
every 4–6 weeks during growing season
Apply fertilizer after watering to prevent root burn; flush soil occasionally to prevent salt buildup; adjust frequency based on growth rate.
Propagation
Methods
Stem cuttings or seeds; stem cuttings are more common for home growers.
Step-by-Step Propagation Guide
- Take a 4–6 inch cutting.
- Remove lower leaves.
- Apply rooting hormone.
- Plant in medium.
- Keep moist and warm.
Best Time: Spring or early summer when the plant is actively growing.
Environment
Warm, humid environment with indirect light; maintain temperatures around 70–75°F (21–24°C).
Medium
Well-draining mix of perlite and peat moss or cactus mix.
Hormone
Rooting hormone is recommended to improve success rates.
Timeline
Roots may develop in 4–6 weeks; establishment may take 2–3 months.
Tools Needed
Pruning shears, rooting hormone, small pots, well-draining medium.
Quick Tips
Use healthy, non-flowering stems; maintain consistent moisture; provide bottom heat if possible.
Pruning & Repotting
Pruning Guide
Method
Selective pruning of branches to shape the plant; avoid cutting into old wood unless necessary.
Pruning Plan
Prune to maintain shape, encourage bushier growth, and remove dead or overgrown branches.
Tools
Pruning shears, loppers, gloves.
Checklist
Sterilize tools; prune dead/damaged branches; shape the plant; clean up debris.
Repotting Guide
Best Season
Spring, before the active growing season begins.
Pot Size
Increase pot size by 2–3 inches in diameter; ensure good drainage.
Method
Remove plant gently; trim roots if necessary; place in a new pot with fresh soil; water lightly after repotting.
Suggestions
Repot every 2–3 years or when roots fill the pot; necessary to refresh soil and provide space for growth.
Checklist
Choose appropriate pot; prepare new soil mix; handle roots carefully; water after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture; water deeply; ensure drainage; adjust for season.
How to Apply Water Properly
Water directly at the root zone, ensuring even moisture distribution; water early in the morning to reduce evaporation; ensure excess water drains away to prevent waterlogging.
Watering Schedule Tips
Water deeply once the top inch of soil is dry; reduce frequency in winter to prevent root rot.
Soil Improvement
Add perlite or coarse sand for drainage; incorporate compost for fertility; ensure aeration with organic matter.
Temperature Stress Management
Signs of Temperature Issues
Chlorosis, leaf drop, or stunted growth in cold; wilting or leaf scorch in excessive heat.
Cold Stress
Slows growth, causes leaf drop, and may lead to root damage if temperatures drop below 50°F (10°C).
Solution: Move to a warmer location; provide a protective cover; avoid watering during cold spells.
Hot Stress
Leaves may wilt, scorch, or drop; growth may slow due to excessive transpiration.
Solution: Provide shade during peak heat; increase humidity; water more frequently but avoid waterlogging.
Fertilizing Guide
Fertilizing Checklist
Check fertilizer type; dilute properly; apply during growing season; avoid winter feeding.
Fertilizing Method
Use balanced liquid fertilizer diluted to half strength every 4–6 weeks during growing season (spring to summer); avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Slightly ToxicCats may experience mild gastrointestinal upset if they ingest Oroxylum indicum seeds or roots. The toxicity is generally low, but individual sensitivities can vary.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Slightly ToxicIn dogs, ingestion of Oroxylum indicum seeds and roots can lead to mild gastrointestinal upset and discomfort. The toxic compounds are not highly concentrated but can cause adverse effects in sensitive individuals.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Slightly ToxicOroxylum indicum contains compounds that can cause mild gastrointestinal distress and other mild systemic effects when ingested in significant quantities. The seeds and roots are the primary toxic parts due to their higher concentration of bioactive compounds.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: What is the Indian trumpet tree used for?
A: It is primarily used for ornamental purposes and traditional medicine.
Q: Does the Indian trumpet tree attract wildlife?
A: Yes, it attracts bees, butterflies, and birds due to its fragrant flowers.
Q: How tall does the Indian trumpet tree grow?
A: It can grow up to 15-20 meters tall in ideal conditions.
Quick Reference
| Family: | Bignoniaceae |
| Care: | moderate |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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