The American viticulture pioneer Philip Wagner (1904-1996) was a newspaper editor in Baltimore, Maryland. During the American Prohibition (1920-1933) he began to occupy himself with viticulture as an amateur cellarman. In 1933 he published the book "American Wines and How to Make Them". Then, in 1939, he began to import French hybrids and grafting rootstocks from France on a large scale from the famous Baco, Seibel, and Seyve-Villard vineyards. He tested them for their suitability for viticulture at the Boordy Vineyards, a vine nursery and winery founded by him and his wife Jocelyn. From there the grape varieties were spread over almost all US states on the American Atlantic East Coast. The book "A Wine-Grower's Guide", published in 1945, was the first work on French hybrids in the USA. Philip Wagner had a major influence on viticulture in the eastern part of North America and steered it in a new direction.