Originally Posted by shoestealer17
How long will a pack of dry yeast last after being opened?
I've never had dry yeast go "dead". Keep it dry, and cool (refrigerator). A few days before you want to start your next batch make up a starter, and put the yeast you want to use in it. Give it a shake every time you walk by it. If it hasn't started working when you want to do your batch, consider it dead and buy a new packet.