Fermentation hasn't begun on WY1968 yeast slurry

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fuzzybee

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(cross-posted to Reddit)

All -

I brewed an IPA yesterday to pitch onto a slurry of WY1968 (London ESB) that I'd saved from a strong bitter I made a few weeks ago. My efficiency was a little higher than I expected, and boil-off was as well, and I ended up with a SG of 1.076. According to my iSpindel, I'm still at 1.076 in the conical after 13 hours. I pitched at 71f, the temperature rose to 72f and has dropped to 67f - all in the happy range for the yeast. I did no oxygenation besides splashing well while transferring from my boil kettle. I added a teaspoon of yeast nutrient to the boil.

I would think that the yeast would have done something by now, even with the high SG. Should I try shaking the conical, or should I give up on this yeast and sprinkle in some US-05 I have? There was a lot of hop particulate in the boil - is it possible that the yeast cake is covered by this? I have another pint of the slurry from my bitter - should I try to pitch that in?
 

McMullan

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You used slurry that's been dormant for a few weeks so expect at least a 2-3 day delay in fermentation activity. The yeast are in shock mode. Just leave it alone. Chances are it's going to be a late kick-off. If slurry isn't being repitched within a few to several days the yeast need to be fed to wake them up before pitching to FV wort, ideally.
 
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fuzzybee

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You used slurry that's been dormant for a few weeks so expect at least a 2-3 day delay in fermentation activity. The yeast are in shock mode. Just leave it alone. Chances are it's going to be a late kick-off. If slurry isn't being repitched within a few to several days the yeast need to be fed to wake them up before pitching to FV wort, ideally.
Thanks! I was presuming I could get away with pitching the whole slurry. For the next reuse of this, I'll make a starter.
 
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fuzzybee

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You used slurry that's been dormant for a few weeks so expect at least a 2-3 day delay in fermentation activity. The yeast are in shock mode. Just leave it alone. Chances are it's going to be a late kick-off. If slurry isn't being repitched within a few to several days the yeast need to be fed to wake them up before pitching to FV wort, ideally.
Thanks for reminding me to be patient. It definitely took off! Down to 1.052 already!
 
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