This is good idea to make use of roof top space to grow vegetables. The scheme called Food from the Sky has planted this vegetable garden on top of the roof of Budgens in Crouch End. The garden was actually started last May and is now producing enough vegetables to sell in the supermarket each Friday. The garden uses food waste from the supermarket to make compost and grows a variety of produce including potatoes, peas, broccoli, strawberries and raspberries. The warmth from the supermarkets heating and lighting systems apparently creates the perfect conditions for the plants because it helps to protect them from the worst of the frosts. The rooftop garden also has the advantage of being free from slugs and snails. It certainly is a good idea and a clever use of space, as the scheme expands hopefully we will see more of these gardens and perhaps one might soon come to a supermarket near you.