Writer: Martin Keen

The cost savings of reusing yeast is significant, but a downside is that you have to brew your next batch before the viability of the yeast greatly declines. However, you can freeze the yeast, which will keep it usable for years. Special precautions need to be taken as just tossing a pouch of yeast in the freezer will rupture cell walls and kill it. This is why you need a cryopreservative. Learn how to freeze yeast correctly. With a bit of preparation and minimal equipment, you too can have a large yeast bank in your freezer to choose from whenever you want to brew your next batch.