Washington’s Walla Walla Valley is home to some of the country’s most fertile soils. Wheat farmers and vintners, or wine-grape growers, have taken advantage of this for decades, and it’s what the region is known for. But it may soon be known for a more unusual crop. Longtime friends Nick Morgan and Jeremy Petty, who worked at the local bottling factory together, both studied winemaking at Walla Walla Community College and worked a little in the wine industry, as most locals do. But when they thought about their next career…