This permaculture roof garden of 200 m2 was planted in 2001 on only 30 cm of soil. With over 180 different species of beneficial plants, it shows how to create your own low-maintenance, low-carbon food forest at home or an outdoor classroom that will enrich learning throughout the curriculum.
It inspired the neighborhood to plant more edible goodies.
In the meantime valuable lessons have been learned. Thinking about water supply is one of them. But you could also consider not opting for 30cm of soil everywhere, but for example putting the trees on the edge and providing a little more soil there. Now you have to keep supplying some ‘fertilizers’ to feed the soil enough. But a good example of how it can be done.