Leek is a cool-season vegetable grown for its tender white stem and mild onion-like flavour. It is used in soups, stews, sauces, and healthy diets. In Kenya, leeks grow well in highland and irrigated areas such as Nyeri, Meru, Kiambu, Nakuru, Nyandarua, and parts of Uasin Gishu. The crop develops long, cylindrical stems with overlapping green leaves. Strong demand from hotels, supermarkets, and health-conscious consumers supports its growing market value.

Varieties
Common leek types include American Flag, King Richard, and Bandit. These varieties differ in stem thickness, leaf colour, maturity period, and yield potential. American Flag produces thick white stems, King Richard matures early with slender stems, while Bandit offers strong disease tolerance. Variety choice depends on market demand and growing conditions.

Growing Conditions
Leek grows best in cool temperatures of 13–22 °C and rainfall of 600–1,200 mm. It performs well in fertile, well-drained loamy soils rich in organic matter with a pH of 6.0–7.5. The crop requires full sunlight for strong growth, while excessive heat reduces stem quality and size.

Growth Cycle
Leek grows from seeds and develops upright green leaves with a thickened white stem base. The plant grows slowly at first but strengthens as it matures. Earthing up improves stem length and enhances the edible white portion. Harvesting takes place when stems reach full size and firmness.

Nutritional Value
Leek contains vitamins A, C, and K, folate, fibre, and antioxidants. These nutrients support immunity, digestion, and heart health.

Uses & Market Potential
Leek is used fresh in soups, stews, salads, and vegetable dishes. It also supports gourmet cooking and healthy diet markets. Rising demand from urban consumers and the hospitality industry creates steady opportunities for commercial production and value addition.