Designed and installed in collaboration with scientists Charlie Price and Becky Bainbridge of Aquaponics UK, a social enterprise, the 12x7m structure's passive thermal design captures and stores a maximal amount solar energy before releasing it into the greenhouse at night, when it is insulated.
Growing is a closed-loop system because vegetable beds are fed by the nutrient-rich water taken from tanks housing tilapia fish, with water purified by the plants then recirculated.
The fish are fed on worms from an adjacent wormery that also yields a "worm tea" for the crops. No chemical fertilisers or pesticides are used, with bio-controls used to keep pests down.
Bainbridge said: "We even tried chameleons to eat the pests, but in fact they just ate everything."
It is expected to yield 30-35kg of fresh produce a week, which is more than adequate to supply the farm's cafe and restaurant.