If kept out, kefir needs to be made every day. Some will say to never put your kefir grains in the refrigerator, but I find that if I put them in the fridge right after I add the milk and cream, they store just fine and can be removed to start culturing again at any time. I have stored kefir grains in the refrigerator for multiple months with success!
Recipe by Cara Comini of Health Home and Happiness. Visit us at healthomeandhappiness.com