Posted: 01/10/2013 at 00:02
Sounds like the potatoes in the bag were too crowded to thrive either that or you didn't give them enough water or both.
You can plant potatoes early if you give them some protection from frosts. I grow mine under clear plastic and the early start means I'm ahead of the blight spores when they invade.
Marfona or Picasso can be nice large spuds if you feed them well. So can Sarpo Mira but I wouldn't touch them with a barge pole as they are like eating cardboard (not that I ever have).
King Edwards and Mayan gold are on the small to medium size but size takes second place to taste for me. If you want a really tasty second early spud that looks good and reaches a decent size try either Marfona or Vivaldi. Vivaldi are just slightly better flavoured but there isn't much in it. Marfona have a firmer texture but both spuds will roast and bake and won't fall apart if you have to boil.
I've just grown Blue Belle (maincrop) for the first time this year and they have been the most productive spuds I have ever grown, nice big spuds too.