Harvest LB-1 Harvest LB-1 is the first pure Lactobacillus plantarum culture selected specifically for sour beer production. Chr. Hansen has developed a new freeze dried, direct inoculation culture of Lactobacillus plantarum. Harvest LB-1 is a dairy free culture, with high cell viability, that produces clean and crisp flavors and aromas that are great for sour beer. Available in a 10 HL dose, it can be stored in a freezer for up to 24 months, and provides fast and consistent fermentations, with full quality compliance and traceability.