Stevia

Stevia, or Stevia rebaudiana (Bertoni) Bertoni, is a perennial herb belonging to the Asteraceae family. The plant is globally renowned for its leaves, which contain steviol glycosides, natural compounds that provide an intense sweet taste with zero calories, making it a highly valuable agricultural commodity in the health food market.

The origin of stevia is traced back to the mountainous regions of Paraguay and Brazil, where it evolved in a subtropical climate. Today, it is commercially cultivated in various parts of the world, including Southeast Asia, China, and South America, as these regions provide the necessary high temperatures and long daylight hours required for optimal growth and glycoside production.

Botanically, the plant is a shrub reaching 60–80 cm in height with slender, opposite leaves and small white flowers. The root system is relatively shallow and fibrous, requiring consistent moisture levels. Because of its sensitivity to cold, commercial cultivation often involves greenhouse propagation or annual cycles in regions with shorter growing seasons.

Agricultural success depends on well-draining, loose, and slightly acidic soils. Growers must manage irrigation carefully, as stagnant water is detrimental to the delicate root structure.

• Ensure adequate sunlight for biomass development
• Maintain consistent soil pH (6.0–7.5)
• Use high-quality seedlings for transplanting
• Implement regular weeding to avoid competition

Stevia is primarily used to extract natural sweeteners for the food and beverage industry, as well as for pharmaceutical applications. The crop is susceptible to certain fungal diseases, such as root rot, and pests like aphids and spider mites, necessitating careful field monitoring and organic or integrated pest management strategies to protect the harvest.