Grazing marshes represent one stage in the drainage and exploitation of land that was once a floodplain swamp or mire. Farmers and engineers installed ditches and windpumps, converting the primeval wetland into a chequerboard of meadows and pastures separated by drainage channels. Often flooded in winter and too wet to grow corn, these betwixt and between landscapes developed into a remarkable haven for wildlife. This course will focus on three themes: a) where are the grazing marshes and what is their history?; b) the plants of ditches and wet grassland – often the finest examples of such habitats anywhere in the lowlands; and c) the present and future conservation status of grazing marshes. We will look in particular at the Somerset Levels & Moors, the Romney & Walland Marshes and the Norfolk Broads, but will take examples from throughout England and Wales.