Saison du Fermier aged with Oregon Blueberries in French Oak Wine Barrels Bleuet du Fermier is our delicate and aromatic Saison du Fermier aged with Oregon Blueberries in French Oak wine barrels. The brightness, depth and rustic character are created by the wild yeast native to our family’s Missouri farm. This Blueberry Saison was fermented in and aged in wine barrels for more than a year.