Posted: 03/11/2014 at 21:57
I grew spuds in bags for about five yrs before growing on an allotment for the first time this yr.
In respect to 1st and 2nd earlies the only difference I've found is spuds may grow bigger on a plot than in bags but you are more in control of pests by growing in bags and as regards amount per plant I'd say it's about the same although you possibly get smaller spuds.
Can't advise on pot sizes but you don't get the same depth in pots to allow the spuds to grow as you would in spud grow bags...bags can be bought cheaply from places like Wilko's. Providing you empty the sacks after harvest and store over winter they last indefinately.
My brother grows in pots and recylce containers, we compared harvests and he didn't get the same return as those grown in bags.
I'd advise you grow in grow bags and plant five seed spuds per bag...