In the high-rainfall zones of the Sikkim Himalaya, receiving nearly 3,500 mm of annual rainfall, excess moisture restricts the growth and productivity of high-value crops like tomato. To address this and ensure summer availability when local supply is limited, off-season tomato cultivation under protected structures has emerged as a promising solution. In Dzongu, North Sikkim, polyhouse-grown tomatoes fetch premium prices (₹80/kg) during the rainy season compared to ₹60/kg for winter open-field produce, offering a profitable opportunity for tribal farmers supplying markets such as Mangan and Dikchu.