WLP565 / Saison Dupont
The classic Saison Dupont strain. Peppery, dry, and notoriously stalls — but produces transcendent farmhouse beers.
What it tastes like
Saison Dupont — arguably the world's most influential saison — is brewed with this strain. It produces peppery, earthy, slightly funky character with a remarkably dry finish (often 90%+ attenuation). The catch: it's famous for stalling at 1.025-1.030 and refusing to finish without significant heat (85-95°F). Brewers who understand how to keep it warm produce great saisons; brewers who don't get sweet, under-attenuated beer.
Best in these styles
Fermentation profile
This strain WILL stall if you don't keep it warm. Standard protocol: pitch at 72°F, let it free-rise to 78-80°F over the first 3 days, then raise to 85-95°F for the final week. Stalled fermentation can sometimes be restarted by adding fresh wort (a 'krausening' shot) or by significant heating.
Available as
WLP565 / Saison Dupont is sold under multiple supplier brand names — same or near-identical strain.
| Format | Supplier | Product code | Notes |
|---|---|---|---|
| Liquid | White Labs | WLP565 Belgian Saison I | 100B cells |
| Liquid | Wyeast | 3724 Belgian Saison | 100B cells |
| Liquid | Imperial | Rustic B56 | 200B cells |
| Dry yeast | Lallemand | Belle Saison | 11g Reliable, won't stall, but less peppery — a different beer than Dupont |
Comparable strains
If you can't source this strain, these alternatives bring overlapping character or fermentation behavior.
History
Saison Dupont (the beer) is brewed at Brasserie Dupont in Tourpes, Belgium — same recipe and same yeast since 1844. The strain leaked to commercial labs in the 1990s and is now widely available. Many craft brewers consider it the saison yeast against which all others are measured.