(Wines&Vines) - The number of wineries in Virginia has more than doubled from 119 a decade ago to 269 today, according to Wines Vines Analytics and the Virginia Farm Bureau. In order for those wineries to market their products as Virginia wines, more than 75% of the wine must be made from Virginia-grown grapes. As the number of wineries has increased, so has the demand for locally grown grapes—but the number of new vineyards hasn’t kept up.