Hibiscus, specifically Hibiscus sabdariffa (also called rosella in Australia), is a tropical plant cultivated primarily for its fleshy calyces — the deep red, cup-shaped structures that surround the seed pod after the flower petals fall. These calyces are dried and used to make a vivid, tart infusion known variously as hibiscus tea, agua de jamaica, bissap, or karkadé depending on the region.
The plant originated in West Africa and spread through trade routes to the Caribbean, Central America, Southeast Asia, and northern Australia. It thrives in tropical and subtropical climates and is now grown commercially across dozens of countries. In Australia, rosella has a long history in Queensland, where it has been used in jams and cordials since the early colonial period.
Beyond beverages, hibiscus calyces are used in jams, sauces, syrups, and confections. The flowers themselves are sometimes used fresh in salads or as garnishes. The plant’s striking colour comes from anthocyanins, the same pigments found in berries and red cabbage.
How it's produced
Hibiscus is grown as an annual crop in tropical and subtropical regions. Seeds are sown at the start of the wet season, and the plants grow rapidly to one to two metres tall. The calyces are harvested by hand after the flowers drop and the seed pods begin to swell, typically four to six months after planting. Harvesting is labour-intensive, as each calyx must be individually picked and the seed pod removed.
After harvest, the calyces are sun-dried or mechanically dried to reduce moisture content for storage and export. In Australia, small-scale rosella cultivation occurs in Queensland and the Northern Territory. The majority of commercially available dried hibiscus is imported from Egypt, Sudan, Nigeria, Mexico, and Thailand.
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