Temperate vegetable consumption in the tropical countries has been increasing recently, and technologies for stable production must be developed to meet the domestic demand and supply.
The climatic conditions are the main constraints on temperate vegetable production in the tropics. Therefore, experiments were carried out in Malaysia to investigate the growth response of temperate vegetables in relation to the climatic conditions in the tropics. Experiments on onion and cauliflower in the highlands suggested that constant temperature and daylength throughout the year prevented the cultivation of high quality products. Experiments on shading in the lowlands showed that this method could be effective in the stabilization of temperate vegetable production.