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Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > How long can I hold open dry yeast???
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Old 08-28-2009, 02:51 PM   #1
Brewkowski
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Default How long can I hold open dry yeast???

I bought a pack of us-05 to add some yeast to a batch and I only used a little bit. So now I've got like 3/4 of a pack in the fridge and it's been there for 10 days or so. Fermentis website says 7 days below 39 degrees, do you think I'm safe to use it for a small batch of cider? Will adding a nutrient help? Oh, it is in a ziplock bag in the fridge.



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Old 08-28-2009, 03:14 PM   #2
wildwest450
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It should be ok. I split packs sometimes on big batches, I seal the end up with my food saver. Never a problem yet.


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Old 08-28-2009, 04:18 PM   #3
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A few years ago, when I was first playing aorund with wine, I used half a pack of some generic dry wine yeast for a batch and left the other half open and sitting in the back of a shelf in the bathroom for 2 years. I found it, and was curious about whether it was still good, so I cooked up a simple table sugar, water, and yeast nutrient solution and tossed it in there; it was still good. Could have been an infection, of course. However, YMMV, of course. :P
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Old 08-28-2009, 06:00 PM   #4
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I'd toss it. It's cheap and several friends have had bad luck reusing opened yeast packs. To me, it's not worth risking a batch for a couple bucks.
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Old 08-28-2009, 08:43 PM   #5
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There ya go...just pick the answer you wanted to hear....

1. use it
2. maybe??
3. toss it...n/g
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Old 08-31-2009, 01:11 AM   #6
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Well I guess fate made the decision. I was actually going to grab it to take out of town to a friends house to get him interested in brewing. So I packed everything except the yeast. So I stopped by a brew store down south and got a fresh pack and started a batch of cider.


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