The gopsi garden started it's life by us placing lots of earth on a drain. We then for obvious reasons had to move this earth to an alternative location, but we also succeeded in blocking up the drain, which led to the creation of the Gopsea (q.v.). This earth was moved by the fence, under a tree, where very little water and even less sunlight could get to it. We tried to solve the former by creating a system that collected water and led it to the Garden. It didn't work.
There was an attempt to plant a plant in the garden, but it was pulled up by Andrew and Stephen, and so it remained empty for a very long time. Admittedly the fact that the earth was on tarmac probably inhibited it's growth slightly, but this did not stop a millimetre high weed naturally growing in it once. It died though, sorry.