When planning to plant seed potatoes in the spring, you first need to determine how many pounds of potatoes you want to have at harvest time. About 7 to 9 pounds of seed potatoes will plant a 100-foot row in the garden in most cases. To determine the yield of the seed potatoes, you will need to do a little math.
Cut the seed potatoes into pieces containing at least one "eye" and the approximate size of a medium hen's egg.
Spread the cut seed potatoes on newspaper, cut-side up, to cure, or "heal over," for 24 to 72 hours.
Weigh the cured seed potatoes.
Multiply the number of pounds of cut seed by 10 to reach an approximate average yield of finished potatoes. In an above average garden space, the yield may be as much as 20 times the weight of the seed. For example, 5 pounds of seed will yield 50 pounds of potatoes in an average garden space, while the same 5 pounds could yield 100 pounds if conditions are perfect.