Cassia surattensis Seeds | Scrambled Egg Tree, Landscape Form
.jpg "Scrambled Egg Tree (Cassia surattensis) seed")
LATIN NAME: Cassia surattensis
COMMON NAME: Scrambled Egg Tree, Landscape Form
Plant Profile
Few roadside trees light up a street like Cassia surattensis in full flower, its branch tips sprayed with bright yellow five-petalled blooms that earned it the name candlewood, and the show repeats through the warm season along coasts from Thailand to the Pacific.
It is an evergreen tree or tall shrub with even-pinnate leaves of many small oval leaflets and upright clusters of clear yellow flowers, each with five rounded petals and a dusting of stamens. The bloom gives way to long, flat pods that hang and rattle, turning dark as they ripen, holding the small seeds.
The plant was long filed under Cassia, but modern taxonomy moves it to Senna with the other leaflet-counting cassias, so you will meet it as Senna surattensis in current floras. The change matters for anyone cross-checking old garden books against new ones.
Micropropagation from nodal tissue has produced clean planting stock and somaclonal lines tuned for dry coastal sites, useful where the tree is wanted as a tough ornamental rather than a wild-collected one. Tissue culture also shields the crop from seed-borne disease.
Planted as an avenue or park tree, it casts light shade and a long yellow season with little care, thriving in full sun and a deep, well-drained soil. It stands heat and coastal air better than many showy trees.
Science & Biotechnology
Like its Senna relatives, the species carries anthraquinone glycosides in the pod and leaf, the compounds behind the well-known laxative action of senna, which is why the plant has a place in traditional medicine as well as in the street.
Alongside the anthraquinones, leaf and flower work reports flavonoids and other phenolics, giving the species a small but real phytochemistry profile that interests screening programmes. The chemistry is modest next to true senna but consistent with the genus.
Uses & Benefits
The chief value is decorative, but the tree also earns its place in fields and fodder rows.
The leaf and pod are used as fodder and green manure in parts of its range, and a row of it marks a field edge while feeding stock, much as other Senna species do in their range. The litter returns nitrogen-rich matter to the bed.
Growing from Seed
Sow the tree from seed after treating the hard coat, in a warm, open seedbed.
Nick or hot-water the seed, then drill it a couple of centimetres deep in deep, free-draining soil and thin the seedlings to a wide spacing so each sapling can make a trunk. It flowers best once established in full sun.
Start in pots and move to the field after four to six true leaves and once the risk of cold is past, watering in well and then letting the young tree harden. A light formative prune shapes a clean single stem for avenue use.
The yellow candlewood is a low-effort street tree, it flowers for a long season with little care and stands heat and coastal air that would scorch many showy trees, so a row of it earns its place in a hot town. Plant it in full sun and a deep, well-drained soil, and it will build a light, open crown that casts just enough shade without darkening the grass beneath.
As a green-manure and fodder tree it fits mixed smallholdings, the leaf and pod return nitrogen-rich matter to the bed and the leaflets feed stock, much as other Senna species do in their range. A row at a field edge marks the boundary and feeds the soil at once, which is why the species travels with people through the warm tropics.
The anthraquinone chemistry means the pod should be treated with the same respect as true senna, useful in traditional medicine but not a casual nibble, so keep the harvested pod away from children and livestock. The ornamental value is the safe, everyday reason to grow it, and the chemistry is simply the interesting footnote that links it to the laxative senna of the herb shelf.
Save seed from a tree that flowers heavily and sets clean, full pods, because the species varies in bloom colour and season, and a careful grower can select a local form that flowers longer and more brightly. Sow after the hard coat is treated, and expect a seedling that asks for warmth and patience before it makes its first street-worthy trunk.
In seaside towns the tree shrugs off salt spray that browns less tolerant ornamentals, so it is a dependable choice where the wind carries the sea, and its tolerance of poor, dry ground means it thrives where lawn trees struggle. Give it room to make a single clean stem and it will repay the space with years of yellow bloom.
Our Take
Yellow candlewood is a low-effort street tree with a long bloom. Read more in our golden shower tree, pink shower tree, and kassod tree guides, or the candle bush.
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