OK, so I've got my seed potatoes, earlies and 2nd earlies I'm growing in bucjets but my maincrop, Desiree, will be grown in one of my raised beds. I know what the spacings are in open ground with no restrictions, but in real life how many seed potatoes could I plant in a raised bed 3.1 x 1.2m?
I should also say that they will be planted in an 18" deep bed that is currently 9" filled, so any plants that come through will be covered with compost, rather than mounded up into rows if that makes sense!