<P> A common misconception about cranberry production is that the beds remain flooded throughout the year . During the growing season cranberry beds are not flooded , but are irrigated regularly to maintain soil moisture . Beds are flooded in the autumn to facilitate harvest and again during the winter to protect against low temperatures . In cold climates like Wisconsin , New England , and eastern Canada , the winter flood typically freezes into ice , while in warmer climates the water remains liquid . When ice forms on the beds , trucks can be driven onto the ice to spread a thin layer of sand that helps to control pests and rejuvenate the vines . Sanding is done every three to five years . </P>
why do you always see cranberries in water
to facilitate harvest and again during the winter to protect against low temperatures