Posted: 03/02/2014 at 16:55
I use soil taken from my veg patch mixed with homemade compost to fill my bags. I generally put 5 first early tubers in each bag. One year I initially part filled the bags and then 'earthed up' by adding more compost as the stems grew. Second year I put all the compost in at once and buried the potatoes at about 18". There didn't seem to be any difference in the final crop. I start mine off towards the end of March and feed with tomato feed from May onwards.