QuestionsHow to growVegetable GrowingPotatoespotatoes 0 Vote Up Vote Down Royston Harris asked 15 years ago What yield do you get out of one potato haulm? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago You could expect about 2kg per plant for maincrop kinds and a little more than half that quantity for early varieties.