Corchorus capsularis aka Jute

Corchorus capsularis is the jute plant, also called gunny-bag plant. It belongs to the mallow family, Malvaceae. Its native range spans the Indian subcontinent to central and southern China. Its original wild habitat is unclear. Growers raise it for stem fibre and edible leaves. It grows in tropical, subtropical, and warm temperate regions.

This fast-growing plant has an upright form with thin, straight stems. In cultivation, it reaches about 10–13 feet [3–4 metres]. Some accounts give a height of 11.5 feet [3.5 metres]. Sources describe it as annual or perennial. Growers often raise it as an annual crop. The stems tend to branch, which makes fibre removal harder. Close spacing can reduce this branching. Each flower has both male and female parts, and insects pollinate them. PFAF lists flowering in August and ripe seeds in October.

Jute needs sun, rich soil, heat, and humid air. It grows in sandy, loamy, or clay soils. It prefers moist ground, but reports differ on waterlogging. Useful Tropical Plants says young plants suffer in waterlogged soil. Older plants can stand very wet ground, including flooding. That source gives a preferred soil pH of 6.5–7. It also reports a much wider tolerated range of 5–8.6. PFAF lists USDA zones 9–11 but says British winters are too cold. In Britain, growers can raise it as a half-hardy annual. Cool summers limit its growth. Sow seeds under glass in spring and plant out after frost. Direct spring sowing suits places with hot summers.

Young leaves can go into salads; older leaves serve as cooked greens. Dried leaves thicken soups and can make tea. The leaves also supply protein. People eat the unripe fruit raw in salads or cooked. Both plant sources list no known hazards. However, PFAF reports a seed compound that affects the heart like digitalin. This does not establish that seeds are safe to eat. The same source records traditional medicinal uses for several plant parts. Those records do not prove that home treatments are safe or effective.

The stems yield jute fibre for sacks and coarse cloth. They also supply fibre for paper. Harvesters cut stems during flowering, then soak them to loosen the fibre. The soft, light wood has served in match making. Its documented garden role centres on useful crops in cultivated beds. PFAF does not flag it as a weed risk. The supplied accounts name no specific pests or diseases.