Red Orbit, one of the top places for science, posted an article from the Bellingham Herald titled “Oregon Grape Growers Provide Model for Sustainability“.  Despite not mentioning Demeter, the certification body for Biodynamic® growers, the articles does state,

Certified Biodynamic requires the third and highest level of sustainability standards, and grape growing and winemaking practices under this category must be performed completely free of synthetic pesticides and fertilizers before certification is granted.

Also, check out the author’s personal website as it is pretty terrific.