I keep mine for a couple months open with no problems.
I have kept dry yeast for 4 months. Once opened, I did the same. Ziplock vacuum bag and back in the fridge. If its been there a while then I just pitch up a little more but if it were maybe 6 months... i would chuck it.
Cool. Thanks for the response everyone. You can tell im new to this. I cant wait to try this white house honey ale. One more week in primary then 2 weeks in bottles. I need to decide if i want to bottle in 16oz swing tops or SN 12oz bottles. Any suggestions?
I've read a few things about Mackeoli and always thought it would be cool to try, but I'm not really sure where I could the yeast or nuruk stuff. I'll ask around a few places and that would be a fun one.