Louisiana wine refers to wine made from wine grapes grown in the U.S. state of Louisiana. Growing grapes in Louisiana is challenging which has hindered its wine industry. The climate of Louisiana is extremely hot and humid, and viticulturists in the state face Pierce's disease, powdery mildew, and other grapevine diseases. There are four commercial wineries in Louisiana that collectively produce about 20,000 gallons (75,000 liters) of wine per year. One of those commercial wineries is Landry Vineyards which is the largest vineyard and winery in Northeast Louisiana. Landry Vineyards grows grapes that are specific to the climate of Louisiana. Louisiana wine industry is small but growing.