Guaraná

Guaraná is grown from seed, which must be sown as soon as it ripens since it loses viability within about 72 hours; germination itself is slow, sometimes taking more than 100 days.

It thrives in warm, humid lowland tropics with daytime temperatures of 24–32°C, tolerating a range of 18–38°C, and can survive brief drops to about 10°C while dormant. The plant does best in full sun or light shade, with steady rainfall of 2,000–2,500 mm and no pronounced dry season, growing in deep, well-drained, loamy soil rich in organic matter; it is traditionally planted on acid, low-fertility soils high in aluminium, with a preferred pH of 4–5.5.

A balanced fertilizer applied during the growing season supports healthy growth, and as a scrambling or climbing vine it benefits from regular pruning to remove dead or damaged branches and manage its shape. Flowering begins about 18–24 months after germination, and mature, multi-stemmed shrubs four to five years old can bear hundreds of inflorescences in a season.

Guaraná fruits mature and split open to release their seeds roughly 75 days after flowering. Seed yields vary widely from plant to plant and year to year, ranging from as little as 0.1 kg to as much as 9 kg per plant, averaging around 500 kg per hectare under field conditions.

After picking, the seeds are shelled, washed, and then dried or roasted before being pulverized into a fine powder for storage and use.

Culinary: The powdered seed is traditionally kneaded into a dough and shaped into cylinders known as guaraná bread, which is grated and dissolved in hot water with sugar to make a stimulating tea. Guaraná extract is also widely used to flavor soft drinks and energy drinks, and a sweetened seed paste has been marketed as a confection.

Medicinal: In traditional Amazonian use, particularly among the Sateré-Maué and other indigenous groups, guaraná seed has been used as a stimulant and tonic for fatigue, as a mild diuretic, and to address headaches, dysmenorrhea, digestive disorders, and chronic diarrhoea.

Guaraná originates in the Amazon basin, where the Sateré-Maué people have used it for beverages and medicine for more than 2,000 years. A Sateré-Maué origin myth attributes the plant's domestication to a deity who planted the eyes of a slain child, one in the forest giving rise to wild guaraná and one in the village giving rise to the domesticated form. The plant was introduced to European colonizers in the 16th century, and Brazil remains the only country that cultivates it on a commercial scale today, with more than 15,000 hectares under production.