Posted: 10/03/2014 at 23:21
I've done it too. I used garden compost, like Verdun, and left it for a year to settle. It grew a grand crop of weeds, so must be fertile! I started planting it up in the autumn and will finish off this spring. If not enough compost is available, soil from elsewhere would be fine. Not sure what could be used if you need to buy it in - topsoil, I suppose.