Texas is the largest state in the United State, and it is one of the most planted with vineyards in the country. Viticulture has been practised since the mid-17th Century, when Spanish missionaries planted vines in the area around the modern border between Texas, Mexico and New Mexico. The region is divided into three main wine-growing areas including North-Central, South-Eastern and Trans-Pecos. The latter relates to everything west of the Pecos River, which is in southern New Mexico and flows south towards the Gulf of Mexico. These areas of Texas are too hot, and the eastern corner too humid for producing quality viticulture, nevertheless wine production continues there despite these climatic limitations. There are some mesoclimates that are allowing the growth of classical grapes as Cabernet Sauvignon, Chardonnay, Chenin Blanc and Sauvignon Blanc. The best vineyards of Texas are found within the North-Central region, which produces wines of both quality and quantity and has the highest density of wine-bearing vines in the state. The region hasn't found yet its identity, but it has tremendous potential, and many investors are starting to plant vineyards in the desert like landscape of the region. Texas is an up-coming region may be 20 years from now.