Region	Entre-Deux-Mers -Surface: Surface: 1778 ha. -Only wines from the defined parcels of the département de Gironde, between the Garonne and the Dordogne. -Only white wines -Grape varieties white wines: minimum 70%: Sémillon, Sauvignon blanc, Muscadelle, maximum 30% Merlot blanc, maximum 10% Colombard, Mauzac, Ugni blanc -Max. 60 hl. per ha. for white wines		The grape varieties The châteaux Deposits of the river. Mostly sandy, heavy clay with small gravels. The Entre-Deux-Mers has a maritime climate, caused by the Atlantic. The warm Gulf Stream and the Gironde act as a heat-regulator and moderate the climate. This gives the region mild winters, warm summers, and long, sunny autumns. The climate of the Entre-Deux-Mers is different from the Médoc because of the higher rainfall. Also the rivers can flood their near areas. Much to the concern of the vignerons, harvest time and the rainy season arrive about the same time. If the rains come early all grapes will not be fully ripened. If the rains come during harvest, the grapes can lose concentration. The record keepers have observed that in any ten-year span there will be, from a climate point of view, three great years, three poor years, and four that are mediocre. Sometimes the normally mild region is rudely reminded of its northern latitude. In February 1956 a hard frost occurred with temperatures below -18º C (0F). There is also the lingering concern that the Saint de Glace may visit the budding vines in the first weeks of May. Like in 1991.