secondary
Golden Shower
amaltas
Cassia fistula
Also known as Amaltas (Pakistan, India).
- punjab plains
- sindh coast
- pothohar
International hardiness
- USDA 10-12
- RHS H1b
- AU: Tropical, Subtropical
Where it grows — regional guide
| Region | Zones / rating | Notes |
|---|---|---|
| Pakistan | Punjab plains, Sindh coast, Pothohar | A familiar avenue and garden tree of the plains and Pothohar, hung with yellow flower clusters in the early summer heat; the seeds are poisonous and the pod pulp a strong purgative, so keep fallen pods from children and stock. |
| United States (USDA) | USDA 10-12 | A showy flowering tree for frost-free landscapes in southern Florida, Hawaii and similar mild pockets; frost damages it though established trees can resprout, and the seeds are poisonous, so keep fallen pods from children and pets. |
| Canada | USDA 10-12 (USDA scale)Canada uses its own zone system; Canadian zones run roughly one lower than USDA. | — |
| UK & Ireland (RHS) | H1b (10 to 15C) | — |
| Australia | Tropical, Subtropical | A popular flowering tree in tropical and subtropical districts, blooming through summer; it is reported as invasive in parts of Queensland, so check local restrictions, and its seeds are poisonous, so clear fallen pods. |
| India | — | A common ornamental and avenue tree across the warm plains, flowering in the hot weeks before the monsoon, often on bare branches; the seeds are poisonous and the pod pulp a strong purgative, so keep pods from children. |
| Middle East & North Africa | — | Planted along irrigated avenues and in parks, coping with intense heat once established and tolerating some salt; the seeds are poisonous and the pod pulp purgative, so keep fallen pods from children and pets. |
The golden shower tree (Cassia fistula) is a fast-growing, small-to-medium deciduous tree in the legume family (Fabaceae), grown across the warm tropics and subtropics for the dense pendant cascades of bright yellow flowers it throws in summer.123 It is native to the Indian subcontinent and adjacent Southeast Asia, including India and Malaysia, where it occurs naturally in deciduous forests from sea level up to roughly 1,300 m.123 Also called purging cassia, Indian laburnum, and the pudding-pipe tree, it is primarily an ornamental and traditional-medicine species, not a food crop.3 For a homesteader in a frost-free climate, its honest appeal is reliable early-summer shade and ornamental impact from a tree that establishes quickly and tolerates heat, drought, and a wide range of soils once rooted in.1
Description and identification
Golden shower is a fast-growing tree typically reaching 10 to 15 m (about 30 to 50 ft) tall and roughly as wide, with landscape specimens often noted at around 30 to 40 ft in both height and spread.13 It is deciduous: the leaves drop briefly and are then quickly replaced.1 Foliage is pinnately compound, with individual leaflets up to about 8 in long and 2.5 in wide.1 The signature feature is the bloom: profuse, drooping clusters of bright yellow flowers that drape the branches in summer and give the tree its “golden shower” name.123 These are followed by distinctive cylindrical pods up to about 60 cm (2 ft) long, dark brown and round in cross-section, which persist through winter before falling; each holds many seeds embedded in a sticky brown pulp.13 The combination of yellow flower cascades and very long, dark, sausage-like pods makes the tree easy to identify even out of bloom.13
Growing Golden Shower
The tree is propagated by seed.1 The seeds are borne in the hard pods; while scarification or soaking is standard practice for many legumes, the reputable sources here do not specify a pre-treatment method for this species, so no exact protocol is claimed. Note that the seeds themselves are poisonous, so handle and store pods with that in mind.1
- Sun: Give it full sun, which is required for the best flowering.1
- Soil: It tolerates clay, sand, and loam, and both acidic and alkaline ground, provided the site is well-drained.1
- Water and drainage: Grow it on well-drained soil; it is moderately drought- and salt-tolerant once established and dislikes waterlogging. The sources do not give a precise irrigation schedule, only that it tolerates some drought and does not like wet feet, so water it through establishment and then taper off.1
- Spacing: The mature crown spreads roughly 6 to 15 m (20 to 50 ft), so space trees on that order to keep crowns from crowding.12
- Training and pruning: Young trees often grow asymmetrically with drooping branches, so staking and structural pruning while young help form a uniform crown; occasional later pruning controls shape and lifts low, drooping limbs.1
The tree is described as fast-growing and a heavy bloomer, well suited to tropical and frost-free subtropical climates; UF/IFAS lists it for USDA hardiness zones 10B to 11.1 It is damaged by temperatures slightly below freezing, but established trees can resprout after cold damage once warm weather returns.1
Harvest and uses
Golden shower is grown chiefly as an ornamental and shade tree, prized for its flowering display rather than as a productive food or cash crop.13 It is not a food plant, although the flowers are eaten locally in some parts of India.3 The long pods are the most conspicuous product, but their seeds are toxic and the pulp is a strong purgative, so the tree’s practical homestead returns are best understood as summer shade, structure, and ornamental value rather than an edible harvest.13
Where it grows and naturalized status
Beyond its native Indian subcontinent and Southeast Asian range, golden shower is widely planted and has naturalized throughout the tropics, including the West Indies, Mexico, parts of Central and South America, and Micronesia.34 It is reported as invasive in Queensland, Australia, so check its status locally before planting.3 For Florida, the UF/IFAS assessment lists it as “not considered a problem species at this time, may be recommended.”1
Safety and cautions
This tree carries real toxicity, and the sources are explicit about it.13 A few grounded points for any grower:
- The seeds are poisonous. UF/IFAS states plainly that “the seeds contained within are poisonous,” and that propagation is by these poisonous seeds.1 Keep fallen pods away from children, pets, and livestock, and handle seed accordingly.
- The pulp is a strong laxative. The pod pulp acts as a powerful purgative; the older common names “purging cassia” and “pudding-pipe tree” reflect this.3 Any internal use is a medicinal matter for professional guidance; this profile makes no medical claim and gives no dosage.
- Traditional use is not proof of safety. A long history of traditional use is not the same as a tested, safe home remedy; treat it conservatively.3