W. Va. Code § 60-1-5A

(a) For the purpose of this chapter “Farm winery” means an establishment where in any year 50,000 gallons or less of wine, which includes hard cider, and nonfortified dessert wine are manufactured exclusively by natural fermentation from grapes, apples, pears, peaches, other fruits or honey, or other agricultural products containing sugar and where port, sherry, and Madeira wine may also be manufactured, with 25 percent of such raw products being produced by the owner of the farm winery on the premises of that establishment and no more than 25 percent of such produce originating from any source outside this state. Any port, sherry, or Madeira wine manufactured by a winery or a farm winery shall not exceed an alcoholic content of 22 percent alcohol by volume and shall be matured in wooden barrels or casks.

(b) Notwithstanding the provisions of subsection (a) of this section, a farm winery may include one off-farm location. The owner of a farm winery may provide to the commissioner evidence, accompanied by written findings by the West Virginia Agriculture Commissioner in support thereof, that the owner has planted on the premises of the farm winery young nonbearing fruit plants. The commissioner may grant permission for one off-farm location when the location produces in an amount equal to that reasonably expected to be produced when the nonbearing fruit plants planted on the farm winery come into full production. The length of time of the permission to use an off-farm location shall be determined by the commissioner after consultation with the Agriculture Commissioner.