60s Pot Farm Becomes Napas First Certified Biodynamic Winery

While the original property was already peppered with wine grapes, it's rumored they were just a cover, literally.

During the '60s the vines were supposedly used as a cover crop for marijuana growing on the property. Most of that crop has been eradicated from the property, but some plants still pop up every now and then.

Source:
http://www.treehugger.com/files/2011/01/benziger-60s-pot-farm-becomes-napas-first-certified-biodynamic-winery.php