how many potatoes

Hi, i have bought three 2.5kg bags of seed potatoes, one firsts, one seconds and one main crop and i was wondering how many potatoes i can expect to get. i know that this will depend on local conditions, wether etc and a load of other things but i was wondering if anyone may have a rough idea.

Massa - I am also in Sheff and last year my pentland javlin earlies planted in black bags on my patio gave a pan of spuds for every seed spud. I could not say what the weights were but it worked out at roughly a meal per seed spud.

My plot is Park Rifles which is just off City Road. I dont think you can keep seed spuds until next year but you might be able to squeeze in a few in bags on a patio etc. I help look after a friends plot and have one of my own I have just taken over. Like you, I ended up buying too many seed spuds but have got some plastic bags for growing spuds in. Each takes 3 or 4 so my path is going to have 10 of these sat on the path and I am going to grow the earlies in bags and the second earlies and maincrop on the allotment. If you have a patio or somewhere to stand bags you could use your earlies and plant the others on your plot if space is tight. Then use the earlies as you need them and once they have gone you should be able to harvest and store your maincrop.