This includes the modern-day archetype of saison, Saison Dupont. But this beer, Saison Dupont, it’s just the way that a specific brewery, only one brewery, decided to evolve in its own history. There Is No Such Thing As Saison YeastDe Baets points the finger at yeast companies for taking that Dupont yeast strain and marketing it as “saison yeast.” “We had phenols from Brettanomyces—tons of them—not the phenols like the ones we have in Saison Dupont…. In his modern interpretations of saison, Schallau uses a commercially-available yeast branded as a saison strain.