Sour Weapon L (Lactobacillus plantarum Blend)

(2 customer reviews)


BBXSWL – Sour Weapon L (Lactobacillus plantarum Blend) – the second member of our Sour Weapon™ family

Availability: Limited

Source: Traditional Norwegian Kveik brewers.

🏆 Sour Weapon L helped win a medal in American Fruited Sour Ale (GABF 2021) for Lynnwood Brewing Concern 🏆

The De Lacto Standard! We’ve tested countless LAB cultures over the years, and this blend of Lactobacillus plantarum is the most brutally effective Lactic Acid producer we’ve found!

If you’re looking to drop the pH of wort as quickly and low as possible, Sour Weapon L is your go to Lacto blend. At 98F, we’ve had trial batches drop the pH of wort to 3.0 after just 24 hours. When pitched at 84F, pH should reach 3.5 in 24 hours.

This is the ideal bacteria blend to use for acidifying wort for quick/kettle sours, and is also very effective when co-pitched with a yeast strain. As with any Lactobacillus culture, we recommend only using in wort with zero IBUs as even small amounts of hops may prevent significant souring.

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 Ordering & 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.

Available on backorder


Catalog: BBXSWL – Sour Weapon L (Lactobacillus plantarum Blend)

Brewing Info*:

  • Type: Lactic Acid Bacteria. Wild Lactobacillus plantarum.
  • Pitching Rate: Directly pitchable into 5 gallons of wort
  • Estimated Attenuation: N/A
  • Estimated Final pH: 3.0-3.5
  • Flavor/Aroma Profile: Lemon, Yogurt, Lactic Acid Sourness
  • Flocculation: Low
  • Recommended Quick Souring Temperature: 84-98ºF

Product Category: Dusty Bottoms Collection™

The Dusty Bottoms Collection™ is our ode to unique and hard to find cultures sourced from commercial fermentations. As much as we love local yeast, there are just some flavors and aromas that can’t be reproduced by plucking yeast out of thin air.

Many of these cultures have been used for generations to make some of the most consistently wonderful beverages in the world. Whether it’s brewer’s yeast, Brettanomyces, or Lactobacillus…these aren’t Local Yeast by our definition, but certainly were local at one time.

Additional information

Weight.1875 lbs
Dimensions8 × .5 × 5 in

2 reviews for Sour Weapon L (Lactobacillus plantarum Blend)

  1. Nick yuill

    This is a great lacto culture, fast, multi dimentional sour. I have used this in a mix culture with sacch, funk weapon 2 and 3, along with other bretts and have been able to make diverse wild, farmhouse, and sour ales. Flavors of lemonaid and citrusy, balance well without getting too sour with no hops in boil and with raw ales.

  2. Joshua Jackson

    This is one of the best, most consistent lacto cultures available to Homebrewers. This (especially combined with Sour Weapon P) provides a clean, fast sour with very little additional input needed. While I generally follow Jeff’s instructions pretty clearly, with my last beer made with these cultures (a Cranberry Raspberry berliner weisse) I pitched at 90 and let it free fall to around 85 – 82 and still saw the pH drop to roughly 3.47 in 36 hours (on top of that the beer scored a 41 at 2019 NHC). Another great culture from a great company!

Add a review

You may also like…