Mustard is a fast-growing leafy vegetable and spice crop grown for its nutritious leaves and oil-rich seeds. In Kenya, it serves as both a vegetable and a condiment crop supplied to fresh markets and small-scale processors. Farmers grow it in highland and mid-altitude regions such as Nakuru, Nyeri, Meru, Kiambu, Uasin Gishu, and parts of Western Kenya. The plant produces tender leaves for repeated harvesting and seed pods used in spice production.

Varieties
Varieties include green, red, and white mustard (Sinapis alba). Green mustard produces soft leaves for cooking, while red mustard has a stronger flavour and deep colour. White mustard produces seeds used in spices, oils, and food processing. Each type serves a specific market, so farmers choose varieties based on whether they grow for leaves or seeds.

Growing Conditions
Grows best in cool to moderate temperatures of 15–25 °C and rainfall of 500–1,200 mm. It performs well in fertile, well-drained soils rich in organic matter with a pH of 6.0–7.5. The crop needs full sunlight for strong growth. High temperatures reduce leaf quality and trigger early flowering.

Growth Cycle
It grows from seeds and forms compact plants with broad green or reddish leaves. It produces yellow flowers that develop into seed pods. The crop allows repeated leaf harvesting before full maturity, depending on use.

Nutritional Value
Mustard leaves contain vitamins A, C, and K, calcium, iron, and antioxidants. These nutrients support immunity, bone strength, and digestion. Mustard seeds provide oils used in cooking and processing.

Uses & Market Potential
Mustard leaves are cooked like sukuma wiki or spinach. Seeds are processed into spices, oils, and condiments. Demand in fresh vegetable and spice markets supports strong commercial opportunities.