Skip to main content

Oroxylum Indicum (Oroxylum indicum)

Oroxylum indicum, the Indian trumpet flower, is a fast-growing tree from Southeast Asia, noted for its large, trumpet-shaped flowers and long, flat seed pods.

Oroxylum indicum, commonly referred to by its scientific name, is a remarkable tree species native to the Indian subcontinent and Southeast Asia. It holds a place of significance in its native regions due to its unique morphology and traditional uses. This tree is characterized by its striking appearance, often growing as a medium-sized tree reaching heights of up to 15 meters, though it can occasionally grow taller. Its growth habit is typically erect, with a relatively sparse branching pattern. The leaves of Oroxylum indicum are large and bipinnately compound, meaning they are divided twice, creating a feathery, fern-like appearance. These leaves can be quite substantial, contributing to the tree's distinctive silhouette. The flowers of Oroxylum indicum are particularly noteworthy. They are large, trumpet-shaped, and often a deep purplish-red or maroon color, with a pale interior. These nocturnal flowers are borne in terminal panicles and are fragrant, attracting specific pollinators. Following flowering, the tree produces a distinctive fruit, a long, flattened, pendulous pod that can reach lengths of up to 60 centimeters. These pods are dark brown when mature and split open to reveal numerous flat, winged seeds, which are dispersed by wind. The bark of Oroxylum indicum is typically greyish-brown and can be smooth or slightly fissured. Oroxylum indicum thrives in a variety of natural habitats, often found in open forests, grasslands, and along the edges of forests, typically at elevations ranging from sea level up to around 1200 meters. It prefers moist, well-drained soils and can tolerate a range of light conditions, from full sun to partial shade. While its native distribution is extensive across tropical and subtropical Asia, its cultivation outside these regions is less common, primarily due to its specific environmental requirements and lack of widespread ornamental appeal compared to other species. Beyond its botanical interest, Oroxylum indicum has a history of traditional medicinal use in its native regions. Various parts of the plant, including the bark, roots, and leaves, have been employed in indigenous medicine for a range of ailments. The seeds have also been noted for their potential uses. Ecologically, the tree provides habitat and food sources for local fauna. Its large leaves and distinctive flowers and fruits make it a visually interesting specimen, though its primary recognition stems from its ecological role and ethnobotanical significance rather than widespread horticultural application. The unique structure of its fruit and the dispersal mechanism of its winged seeds are fascinating adaptations for reproduction in its natural environment.

Above information is sourced from Wikipedia

Sunlight

Prefers full sun to partial shade.

Watering

Keep soil consistently moist but not waterlogged.

Soil

Well-draining, fertile loam is ideal. Tolerates a range of soil types but dislikes waterlogged conditions.

Temperature

Thrives in warm temperatures.

Habitat

Outdoor, Greenhouse

Fertilizer

Feed with a balanced fertilizer during the growing season.

Care Requirements

Light

Prefers full sun to partial shade.

Protect young plants from intense midday sun.

Water

Keep soil consistently moist but not waterlogged.

Water deeply during dry periods.

Soil

Well-draining, fertile loam is ideal. Tolerates a range of soil types but dislikes waterlogged conditions.

Temperature

Thrives in warm temperatures.

Ideal range 20-30 °C.

Habitat

Outdoor, Greenhouse

Fertilizer

Feed with a balanced fertilizer during the growing season.

Reduce feeding in winter.

Plant Overview

Plant Type

Tree

Plant Category

Flowering, Ornamental

Plant Place Type

Ground

Plant Environment

Outdoor, Greenhouse

Lifespan

Perennials

Plant Height

10-20 m

Spread

5-10 m

Growth Rate

Fast

Dormancy

None

Leaf Color

Green

Leaf Type

Compound

Flower Size

10-15 cm

Image Gallery

Flowering & Fruiting Cycles

Monthly activity intensity for bloom and fruit across both hemispheres.

Northern hemisphere

Flowering & fruiting calendar

Peak bloom · JulPeak fruit · May
FloweringFruiting
02468JanFebMarAprMayJunJulAugSepOctNovDecActivity intensityMonths67
Southern hemisphere

Flowering & fruiting calendar

Peak bloom · JunPeak fruit · Mar
FloweringFruiting
02468JanFebMarAprMayJunJulAugSepOctNovDecActivity intensityMonths67
Synonyms
Arthrophyllum ceylanicum Miq.
Arthrophyllum reticulatum Blume ex Miq.
Bignonia indica L.
Bignonia lugubris Salisb.
Bignonia pentandra Lour.
Bignonia quadripinnata Blanco
Bignonia tuberculata Roxb. ex DC.
Calosanthes indica (L.) Blume
Hippoxylon indica (L.) Raf.
Oroxylum flavum Rehder
Spathodea indica (L.) Pers.
Taxonomy
  • kingdomPlantae
  • divisionTracheophyta
  • classMagnoliopsida
  • orderLamiales
  • familyBignoniaceae
  • genusOroxylum
  • speciesOroxylum indicum
Toxicity

Toxic for humans

No

Rating: 0/5

Toxic for pets

No

Rating: 0/5

Edible

No

Additional Care Tips

Water deeply and regularly, especially during dry periods, to maintain consistently moist soil. Avoid waterlogged conditions.

Prune to shape and remove dead or crossing branches. Heavy pruning can be done in late winter or early spring before new growth begins.

Easily propagated from seeds sown in spring. Cuttings can also be taken from semi-hardwood in summer.

Young trees may need repotting annually into a larger container. Mature trees generally do not require frequent repotting.

FAQs

What is the best soil for Oroxylum indicum?

Oroxylum indicum prefers well-draining, fertile loam. It can tolerate various soil types but must not be waterlogged.

How often should I water Oroxylum indicum?

Water regularly to keep the soil consistently moist, especially during dry spells. Reduce watering in cooler months.

When does Oroxylum indicum bloom?

Oroxylum indicum typically blooms in the summer and autumn, producing large, fragrant, trumpet-shaped flowers.

Is Oroxylum indicum poisonous?

No, Oroxylum indicum is not considered poisonous to pets or humans.

How large does Oroxylum indicum grow?

This tree can reach a mature height of 10-20 meters with a spread of 5-10 meters.