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Old 02-16-2013, 04:11 PM   #1
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Default Pitched yeast too cold? **Update** Re-Pitched Yeast

Made my 4th brew last night, Amarillo pale ale. I cooled the wort to 59-60 degrees by mistake. I rehydrated the dry yeast (US-05) and pitched. I put a blanket over the fermenter over night and its reading about 63 degrees right now and no signs of fermentation. I normally show fermentation within 8 hours of pitching with this yeast, but I normally pitch the yeast in 70 degree wort.

Do you think I should make a hot bath to put the fermenter in? I think 63 is a good temp but maybe the yeast went dormant. Should I give the wort another good stir to get things moving? Thanks!


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Old 02-16-2013, 04:13 PM   #2
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No, you've pitched at a perfect temperature IMO. Pitch cool and let it come up to temp. You're still in lag phase and 8 hours is well within range for lag phase. I always cool to ~63F and pitch, then let it warm up. Once the fermentation takes off you won't have to rush to bring the temps down by pitching cool.


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Old 02-16-2013, 04:19 PM   #3
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Originally Posted by stpug View Post
No, you've pitched at a perfect temperature IMO. Pitch cool and let it come up to temp. You're still in lag phase and 8 hours is well within range for lag phase. I always cool to ~63F and pitch, then let it warm up. Once the fermentation takes off you won't have to rush to bring the temps down by pitching cool.
Good to know. I think I may have shocked the yeast too. I rehydrated in 85-90 degree water for 15 min, stirred and pitched on 60 degree wort lol. Poor yeasties....
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Old 02-16-2013, 04:19 PM   #4
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Agree with above. As long as the rehydrated yeast wasn't 20F hotter than wort, no harm was done. Take the blanket off, let it warm up naturally and it might turn out to be your best beer yet.
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Old 02-16-2013, 04:21 PM   #5
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I'd just let it ride. It is a little cool to start, but not enough to stop all activity. With the temp increasing, i'd say you are in good shape. Give it another day before you start messing around with it.
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Old 02-16-2013, 04:23 PM   #6
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Agree with above. As long as the rehydrated yeast wasn't 20F hotter than wort, no harm was done. Take the blanket off, let it warm up naturally and it might turn out to be your best beer yet.
Read my above post, we posted at the same time. So shocking the yeast wont kill them right?
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Old 02-16-2013, 04:31 PM   #7
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You are fine, lag time might be a little longer than usual. Pitching too cold makes yeast sleepy, they are like me- they'll wake up sloooowly.
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Old 02-16-2013, 04:35 PM   #8
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Originally Posted by BansheeRider View Post
Read my above post, we posted at the same time. So shocking the yeast wont kill them right?
Well if the water started out at 85-90, and it was likely a small amount (a couple of ounces), it'll cool quite a bit in 15 minutes since it has such a small thermal mass. I don't think it was much of a shock.
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Old 02-16-2013, 04:39 PM   #9
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Well if the water started out at 85-90, and it was likely a small amount (a couple of ounces), it'll cool quite a bit in 15 minutes since it has such a small thermal mass. I don't think it was much of a shock.
Yeah it was only 1 oz of water. I guess I need to RDWHAHB
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Old 02-16-2013, 04:39 PM   #10
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You did everything just right. Do it like that every time!

Secret- I never rehydrate dry yeast and no one has ever been able to tell. Shhh. I and many others have done side-by-side comparisons (1.060 or lower) and the "pitched dry" always comes out ahead. Shhhhhhhh. Wouldn't want to upset the folks who prefer to complicate things.



Cheers!


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