Number of acres of grapevines certified as biodynamic worldwide. According to the global biodynamic certification organization, Demeter, both vineyards and wineries can gain certification separately. As of 2020, there were 1,010 wineries certified globally— of which only 32 are in the U.S. However, the number of acres of certified biodynamic vineyards in the U.S. currently stands at 3,788. Since many winemakers farm biodynamically without becoming certified, the actual number of biodynamic vineyards is probably even larger.