Catalpa bignonioides Seeds | Southern Catalpa
LATIN NAME: Catalpa bignonioides
COMMON NAME: Southern Catalpa, Indian Bean Tree
Plant Profile
Southern Catalpa (Catalpa bignonioides) is a deciduous tree of the trumpet-creeper family (Bignoniaceae), native to the southeastern United States. It reaches 10-18 m, with huge, heart-shaped leaves, showy clusters of white, spotted, orchid-like flowers in early summer and long, thin, dangling pods. Widely planted for shade and bloom, it has naturalised well beyond its native range.
Science & Biotechnology
The species features in the wider study of the Catalpa group, and its traits make it a useful subject for work on germination biology, cultivation and ornamental selection. This close, practically significant ecological relationship has made catalpa a deliberately planted tree in some rural Southern properties specifically to cultivate a reliable supply of fishing bait. It retains a following among breeders and collectors, which keeps seed stocks in circulation.
Uses & Benefits
Gardeners value Southern Catalpa for its ornamental character, and the plant also fits naturally into herb, vegetable and cutting gardens. Its long, hanging seed pods also add distinctive winter interest once leaves have fallen. A plant that has settled in will get along with only routine care.
Catalpa bark and pods had folk use as a mild laxative and worm remedy in America, though the tree is grown today for its orchid-like flowers and shade.
Growing from Seed
Raising Southern Catalpa from seed is straightforward. Sow seed into a loose, well-drained mix and keep it consistently moist, since this species needs no special pretreatment. Full sun to light shade suits this adaptable tree well, and it typically grows quickly, developing its characteristic bold foliage and showy flowers within a relatively short number of years. Use a loose, well-drained seed compost, sow evenly over the surface and cover lightly, and keep everything evenly moist in full sun. Grow the youngsters on steadily in pots until well rooted, then move them to their final positions.
Our Take
The medicinal tradition behind this species, outlined above, is a large part of its interest. Once established, Southern Catalpa, Indian Bean Tree largely looks after itself. From then on, routine care is all that is required.
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