Storing potatoes

[Paulines7]

I don't have much luck storing potatoes and would like some advice from fellow gardeners, please.   I store my potatoes in bags in a large, disused chicken shed that is not frost free and they eventually succumb to the cold.  I was thinking that this year I might try adding general purpose compost to the bags.  Has anyone ever tried this?  If I leave the potatoes in the ground for longer than necessary, the thin sandy soil exposes the tubers which then turn green so I need to dig them out fairly soon.  I have mainly King Edwards and Pink Fir Apples.    :-\

Pauline

[Paulines7]

[daisymay]

see this from yesterday:

http://www.allotments4all.co.uk/yabbse/index.php/topic,12454.0.html