My soil is a bit problematic - so I intend to make a number of no dig gardens. My plan is to grow potatoes using the hay method - and these beds will then compost down to be my first beds for other vegetables. I know that I should be using certified seed potatoes but am having trouble sourcing some at present. What experience have reader had with just buying the types of potatoes they want from the fruit shop, shooting these and using them as the seed potatoes??? Is this likely to be a problem. Then what about subsequent crops - if I did get seed potatoes, do I have to do this each time or can I use my own potatoes that I have grown??