If you buy in the seed potatoes each season for planting the suggestions put forward so far in the thread are fine,but myself who maintains a collection of heirloom varsities i plant the biggest and best spuds from the heaviest producing plants each year.Rima (pictured on the left)for first ten years only grew 1 or 2 tiny small tubers,but the 5 season has seen the size increase dramatically and has really become a good producer.
