Image shows fields of rhubarb, and the forcing sheds, which produce 150 tons annually at the farm of E. Oldroyd & Sons (Lofthouse) Ltd. The rhubarb plants are grown outside for three years to strengthen them and store energy. Crowns are then selected for the forcing sheds where they are kept in a low lit, warm moist environment. The lack of light encourages the plants to produce sweeter, tender red stalks, over a period of about 6 weeks. They are then pulled, not cut, for market. The National Indoor Rhubarb Championships are held in Wakefield each February, when growers compete for the title of Champion Forced Rhubarb.