Linz sounds to me like you are already growing against the odds, think your situation would make a very interesting programme, think of all the people you could inspire, potatoes in the front lawn is inspirational. Its also educational, how many people have seen a potato actually growing. Could you grow kiwis over the front porch? Or rasperies in the hedge. Definitely put yourself forward for River Cottage. (I'll get someone to record it so I can see it here). HM