This growing all started from my previous instructable, "window box on a bike", which showed me that growing food is possible almost anywhere. http:/...
Step 3: Fill bed.
To cheaply fill the bed, I started with some sand that a neighbour didn't want, some soil that was in a skip, and leaf mould and compost made from my vegetable peelings that I have been composting for the last few months.
I put a top layer of compost from a garden centre.