I grew potatoes last year in tubs and in a dustbin,they all were a great success,this year I planted early (end of march)in 2 dustbins I live in the north east and to say the weather was a bit up and down is an under statement they got over wet for a few weeks then the got -5 /6 for a week.I really thought I had waisted my time,but to look at them now 1 bin is already up to the top Ive earthed these with a mix of compost out of our bin and multipurpose from the garden center.The other bin they are only approx 4" or so at the bottom of the bin,I never chitted any of them I didn't last year I do think this might have helped them when it froze because they had no shoots on them,im going to plant some singles in the tubs I used last year for later on.