The Mad Fermentationist Saison Blend

(7 customer reviews)


BBXMAD1 – The Mad Fermentationist Saison Blend

Availability: Limited

Source: A unique blend of cultures curated by The Mad Fermentationist, Michael Tonsmeire

Bootleg Biology is proud to announce The First Official Mad Fermentationist Culture!

Fine tuned over two years, this blend morphed over time to become an elegant powerhouse of classic Saison spice, stone-fruit Brett, lactic tartness and a dry but well-rounded body. The final master blend consists of Saison yeast, wild Saccharomyces, rare Brettanomyces and an opportunistic Lactobacillus culture.

At temperatures as low as 68F (20C) The Mad Fermentationist Saison Blend exhibits a relatively clean primary fermentation profile and high attenuation. Traditional saison temperatures (around 80F/27C) bring out citrus and elevated phenols (pepper and clove). The Brett character shifts depending on wort composition, as maltier beers emphasize cherry and stone fruit qualities.

This blend integrates beautifully with fruity and tropical hops, with the unique Brett culture keeping hop aromatics crisp and bright for an extended time. For best results use a highly fermentable wort, dry hopping during the tail of active fermentation, and carbonating naturally.

Ordering Information:

🚀🚀🚀 This homebrew culture qualifies for FAST Flat Rate Shipping (2 Day Air) with NO order minimum!

Please note that temperatures may vary wildly during shipment and after delivery. We highly recommend shipping to a person/location that can immediately refrigerate the culture once delivered.

Before ordering, please read Bootleg Biology’s homebrew culture shipping policy. By ordering cultures, you are agreeing to this policy. Thank you!

Commercial Brewers: Please visit our Commercial Pitches page to order 1 to 30BBL sized pitches.

In stock (can be backordered)


Catalog: BBXMAD1 – The Mad Fermentationist Saison Blend

Brewing Info*:

  • Type: Blend of Saccharomyces, Brettanomyces and Lactobacillus cultures.
  • Pitching Rate: Directly pitchable into 5 gallons of 1.050 or lower wort
  • Estimated Attenuation: 90-100%
  • Estimated Final pH: 3.5-3.8
  • Flavor/Aroma Profile: Citrus, Pepper, Clove, Cherry, Stone Fruit
  • Flocculation: Medium
  • Recommended Fermentation Temperature: 68F to 80F

* Performance information subject to change due to ongoing testing.

Product Category: Bootleg FerMENTORS Series

Bootleg Biology is the exclusive producer & distributor of The Mad Fermentationist Saison Blend, a unique culture blend created by Michael Tonsmeire.

The FerMENTORS Series features house yeast and bacteria cultures from our favorite mixed-fermentation breweries. From spontaneous, local terroir to artfully inoculated fermentations, these cultures were carefully curated by the best of the best in wild and sour brewing. Never commercially released before, these unique cultures are the building blocks of world-class beers that you can now recreate in your brewery.

Additional information

Weight.1875 lbs
Dimensions5 × .5 × 8 in

7 reviews for The Mad Fermentationist Saison Blend

  1. Brian (verified owner)

    Perfectly versatile Saison Blend. How you brew determines what this blend does.
    More IBUs decreases the acid. Higher mash temps favors the Brett. Add sugar to increase the dry spice.
    A great blend that lets you experiment/refine your brewing techniques. All with different beers in the end.

  2. Peter Schroder

    Used this yeast 3 times now, and love it. I do make a 2 liter starter for a 5 gallon batch (1.070 gravity), within 5 hours fermentation is going very well. First 2 times using it, the beer came out excellent. Lots of fruit notes (pear, peach, apricot) with a nice, light Brett backbone.

  3. Justin (verified owner)

    This is a fantastic and very versatile blend. It makes great hoppy saisons, it makes great funky saisons and when pitched into unhopped wort it makes great sour beers in about 6 months. This blend does it all and gets extensive use in my brewery.

  4. Shawn in San Francisco (verified owner)

    Ordered 6 different strains. Brewed the Maltose Falcons “Saison Experimentale” recipe and split into 6 buckets. The Mad Fermentationist Saison Blend was good 6 weeks after bottling, but was great at 12 weeks when the brett funk developed and gave it great balance. Not very sour yet, but again, well balanced. Definitely will used this one a lot.

  5. Shaun (verified owner)

    Great High attenuation and nice tropical brett after 3 months of conditioning. I was hoping for something close to WLP670 Farmhouse but different and this does a great job at that. Makes a great American Farmhouse or funky Saison

  6. Joe in Hood River (verified owner)

    I’m a fan of this blend, but you have to crank it pretty high if you want saison character to persist. It is a champion attenuator, airlock activity @ 18 days pushing 0.998! At 73-75 primary it provides just enough gentle lactic tartness with a dry, mild phenolic character, perfect for blending my beers that turn out a bit too acetic or low pH. Initial meyer lemon quality turns to a nice dry apricot funk over time.
    At ~5 IBUs, I have co-pitched split batch of 3 gallons, and re-pitched, all three seem to want to go to about 3.9pH after a few days and hang there. I still need to measure the pH of the conditioned bottles, but I opened a couple on our Christmas trip and they were great.

  7. Kirk (verified owner)

    Love using this for my Saisons. You won’t be disappointed. My last 10 gal batch finished out at 1.002.

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