QuestionsHow to growVegetable GrowingPotatoesGreenfly on my potatoes 0 Vote Up Vote Down Linda Cooke asked 14 years ago I am growing potatoes in bags,since April they have just finished flowering, but there is greenfly on the leaves, what should I do? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago The potatoes will be ready in a few weeks and in the meantime you can wash off the greenfly with a jet of water, or some soapy water sprayed at dusk.