Beer yeast stir plates make sure your beer yeast reaches maximum power for fermenting your sugars. We highly recommend you make a starter using your stir starter plate along with some dry malt extract (DME). Homebrew Supply will replace any beer yeast that does not perform in a starter. New to starters? Read our Guide to Making a Yeast Starter. In addition to stir plates and flasks, we have an assortment of tools for yeast harvesting and yeast wrangling as lots of brewers both recycle and harvest their own cultures.