Campsis radicans – Trumpet Vine
Explore Campsis radicans (Trumpet Vine) – its characteristics, habitat, cultivation, propagation, and functional uses and benefits.
Campsis radicans | Botanical Characteristics
Common Names: Trumpet Vine, Cow Itch Vine
Family: Bignoniaceae
Appearance: A vigorous deciduous woody vine with compound leaves composed of numerous serrated leaflets and orange-red, trumpet-shaped flowers borne in clusters. Uses aerial rootlets to climb trees, walls, and other structures. Produces long, bean-like seed capsules containing numerous winged seeds.
Type: Perennial
Evergreen / Deciduous: Deciduous
Layer: Vine / Climber
Root System: Deep, extensive root system with vigorous underground spreading and suckering
Height: 5–12 m or more when supported
Width: 2–5 m or more through spreading and climbing growth
Lifespan: Long-lived
Growth Rate: Fast
Fertility: Self-fertile
Flowers: Hermaphroditic
Pollinator: Hummingbirds, bees, and other insects
Toxicity: Sap contains calcium oxalate crystals causing contact dermatitis and skin irritation; gloves are highly recommended for pruning; ingestion may cause gastrointestinal irritation.
Campsis radicans | Habitat and Cultivation
Range
Native Range: Eastern and southeastern United States
Companionship: Suitable for climbing structures and large trees; vigorous growth and suckering can suppress or overwhelm smaller plants
Invasive Range: Naturalized and potentially invasive in parts of Europe, Asia, Africa, and other regions outside its native range
USDA Hardiness Zone: 4–10
Minimum Chill Hours Required: Requires a true winter chilling period for dormancy; does not thrive in tropical climates without winter cooling.
Resistance/Tolerance
Poor Soil: High tolerance
Drought: High tolerance once established
Shade: Moderate tolerance – flowers best in full sun
Flood: Moderate tolerance
Wind: Moderate to high tolerance
Maritime: Moderate tolerance
Air Pollution: High tolerance
Fire: Moderate tolerance – can resprout from roots after fire or severe disturbance
Thriving Conditions
Sun Exposure: Full sun to partial shade
Soil Moisture: Moderate; adaptable once established
Soil Type: Adaptable; loam, sandy, or clay soils with reasonable drainage
Soil pH: Slightly acidic to neutral
Propagation
Seeds: Yes; readily produced, although cultivars may not come true from seed
Division: Yes – root suckers can be separated
Cuttings: Hardwood or softwood cuttings can be rooted
Campsis radicans | Functional Uses and Benefits
Permalogica cannot take any responsibility for any adverse reactions or health effects from using plants. Always consult a professional before using plants for medicinal purposes.
Edible: No
Medicinal: Used in Traditional Chinese Medicine (TCM) as Ling Xiao Hua to clear blood heat and eliminate stasis; current studies research antioxidant and anti-inflammatory properties; use with caution due to toxicity.
Cosmetics: No documented use
Animal Feed: Not suitable as a forage plant
Fiber: No
Timber: No significant timber value
Firewood: Limited – woody stems can be used as fuel when sufficiently large
Wind Break: No
Fence: Yes – can be trained over fences and structures, but its vigorous growth requires management
Cover Crop: No
Mulch: Limited; fresh clippings root very easily and can accidentally spread the vine; must be fully composted before use as mulch.
Nitrogen Fixer: No
Dynamic Accumulator: No confirmed data
Pollinator Attractor: Yes – flowers are particularly attractive to hummingbirds and also visited by bees and other insects
Pest Repellent: No
Wildlife Supporter: Flowers provide food for hummingbirds and other pollinators; dense growth provides shelter and nesting habitat for birds and small wildlife.
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