Did a short video of how I go about growing a few show potatoes.
I'm no expert but I did have some cracking results last year using this method of polypots and compost.
I always wondered how folks got such perfect blemish free specemins at the shows until I tried it myself.
Dead simple and you get a good crop of "Rejects" to eat too.
Vid below. ;D
http://www.youtube.com/watch?v=-FpgViPfLhs (http://www.youtube.com/watch?v=-FpgViPfLhs)