While on the subject of gardens overseas, this is a picture we took in Paris a few years ago and the product shown below demonstrates the principle involved. A solution for anyone lacking space for a normal garden.

verticle-gardenThis uses an ecological non-toxic felt material that retains moisture, but allows drainage and allows the plants to breathe. The hydroponic principle using fertilizer and water, but not soil, is in fact how many vegetables in supermarkets are grown.