Fresh produce prices shift with the seasons and with each supermarket's supply deals, sometimes varying by 50 percent for the same item on the same day. We check apples, bananas, potatoes, tomatoes, onions, berries, leafy greens and more at Tesco, Sainsbury's, ASDA, Aldi, Morrisons, Co-op, Waitrose, Iceland, B&M, Boots, Superdrug, Savers and Ocado (including M&S). See which shop has the cheapest produce right now and plan your weekly shop around the deals instead of guessing.