Pandak Farms uses three different types of tunnels (high bamboo tunnels, walk-through galvanized pipe tunnels and low steel tunnels) to grow off-season or early vegetables and fruits. 

The tunnels are covered with polyethylene film. The tunnels are removed to the storage when not in use.   Because of the polyethylene film that covers a tunnel, plants and soil inside absorb the heat from incoming solar radiation.   At Pandak Farms, we have learnt that the relatively closed environment of a tunnel has its own unique management requirements, compared with open-field production. Pests and diseases, and extremes of heat and humidity, have to be controlled, and irrigation is necessary to provide water. At Pandak drip lines are used for irrigation inside the tunnels.   

Pandak is the only farm in the area that uses tunnel or greenhouse production system so extensively.