Jambu: how to cultivate and its health benefits

The jambu is a plant typical of the Northern region of Brazil that has slowly been gaining space in home gardens, pots, and gardens across the country. Famous for its slightly anesthetic effect in the mouth — causing tingling and salivation — it is a significant presence in Pará cuisine, especially in dishes like tacacá and duck in tucupi.

With easy cultivation and fast growth, this herb can be planted in both garden beds and pots, as long as it receives the appropriate care in terms of soil, light, and watering. For those seeking an edible, ornamental, and functional plant at the same time, jambu is an excellent choice. Next, you will discover the origin of the plant, its characteristics, and a complete step-by-step guide to growing it at home.

Origin and characteristics

The jambu (Acmella oleracea), also known as Pará watercress or jambuaçu, is a herbaceous plant native to the Brazilian Amazon. Adapted to the hot and humid climate, it naturally grows in fertile, moist soils, particularly in areas near streams and swampy regions. Its leaves are green, soft, and slightly oval. The plant's standout feature is its rounded inflorescences, resembling small yellow buds with a darker center.

What makes jambu unique is the presence of a substance called espilantol, responsible for the numb sensation in the mouth. This characteristic, besides being curious, is linked to medicinal properties that are popularly recognized. It is an annual plant, with a fast cycle, that can reach heights between 30 and 40 cm, forming dense clumps when well cultivated.

How to cultivate and create seedlings

The cultivation of jambu is simple and can be done even by those who do not have much experience with plants. Check the step-by-step:

Soil

Jambu prefers fertile, light soil rich in organic matter. The soil should retain moisture without becoming waterlogged; therefore, mixing with worm castings or organic compost is ideal to ensure nutrients and good drainage.

Lighting

The plant needs plenty of light and several hours of direct sunlight every day. Warm and well-lit projects favor faster and healthier growth.

Seed planting

The seeds should be scattered over the soil's surface and covered with a very thin layer of soil, just enough to protect them without hindering germination.

Germination

In warm and humid conditions, the seeds germinate between 7 and 14 days. During this period, it's important to keep the soil consistently moist.

Watering

Watering should be frequent, especially on hot days. Ideally, the substrate should never dry out completely, as jambu appreciates humid projects.

Fertilization

Every 20 days, it is recommended to strengthen the soil's nutrients with organic matter, such as worm castings or homemade compost.

Transplanting

When the seedlings reach about 8 cm in height, they can be transferred to their permanent location, whether in a pot or garden bed.

Spacing

To allow the plant to develop well, keep about 20 cm of distance between each seedling.

Harvest

Approximately 60 days after planting, it is already possible to start harvesting leaves and flowers. Frequent harvesting stimulates new shoots.

External or internal projects?

Being a plant typical of hot and humid climates, jambu thrives better in external projects, like gardens, vegetable patches, and sunny balconies. It enjoys heat and direct sunlight for a few hours a day.

However, it is also possible to cultivate it in internal projects, as long as the pot is close to well-lit windows, with good air circulation and intense natural light. In such cases, it is important to pay extra attention to watering, as the soil tends to dry out more slowly. Cultivating in pots is quite feasible, provided that the container has good drainage and a minimum depth of 20 cm.

Medicinal and gastronomic uses

Jambu is widely used in Amazônian cuisine. Its leaves and flowers are indispensable ingredients in traditional dishes, providing a slightly spicy flavor and the famous tingling sensation. In contemporary gastronomy, chefs have been exploring jambu in salads, sauces, drinks, and even desserts, taking advantage of its unique sensory characteristics.

Moreover, the plant is known for its popular medicinal uses. The espilantol present in jambu has analgesic, anti-inflammatory, and antibacterial effects. Therefore, it is common to see its use in teas and home preparations to relieve sore throats, canker sores, and oral issues. In the cosmetics industry, jambu extract also appears in creams and facial products due to its potential tightening effect on the skin.

CASACOR Publisher is a creator of exclusive content, developed by the CASACOR Technology team based on the knowledge base of casacor.com.br. This text was edited by Yeska Coelho.