Rosella is used in food, animal feed, nutraceuticals, cosmeceuticals and pharmaceuticals.
The fleshy red calyces are used for making wine, juice, jam, jelly, syrup, spice, gelatine, ice cream and flavours and also brewed into tea, and used as sauce or filling for pies, tarts, and other desserts. The calyces can also be merely chopped and added to fruit salads.
The young leaves and tender stems are eaten raw in salads or cooked as greens alone or in combination with other vegetables and/or with meat. They are also added to curries as seasoning.
The plant is considered to have antihypertensive properties. It has been used in folk medicine as a diuretic, mild laxative, and treatment for cardiac and nerve diseases. A lotion made from the leaves is used on sores and wounds.
The seeds are considered excellent feed for chickens. The residue after oil extraction is valued as cattle feed when available in quantity.