Yeasts are micro-organisms used in brewing to produce alcohol during the process of fermentation.

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Ideal fermentation temperature

I'm just finishing up a DIY fermentation chamber made from a chest freezer, reptile tank heater, and a temperature controller. Now I just need to figure out what temperature to set! Most yeast ...
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How can I restart fermentation on a stuck strong dark belgian ale?

What can we do to restart fermentation that got stuck over the winter? Our club brewed about 7 gallons of this recipe in November. Primary went well, but then the weather got cold and the yeast went ...
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Do yeast die after bottling?

Do yeast die after bottling? My second batch of beer have been stored in bottles over a month now without producing any co2. I want to add some priming sugar to start the fermentation again, but I'm ...
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Flanders Red from Brewing Classic Styles

I am interested in brewing the Flanders red that is found in Brewing Classic Styles. Jamil mentions using the Wyeast 3763 or WLP655 and leaving it sit for a year until the pellicle forms then falls ...
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Wine yeast for beer?

Has anyone ever used wine yeast for a batch of beer or a beer yeast for a batch of wine? I brew beer and my neighbor makes wine and we have been toying with the idea of trying to make a batch of our ...
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Does dry hopping affect attenuation?

Does the anti-microbial affects of hops affect yeast activity and therefore attenuation when dry hopping near the end of primary fermentation?
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What differentiates the lag phase from fermentation?

When making a starter, the intent is to make yeast. We use stirplates in part to continually oxidize the wort, enabling the yeast to multiply. In this question about starter oxidation, one of the ...
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Any need to stop yeast before kegging?

I'm brewing to keg for the first time, finally. I am planning to force carbonate and was wondering: Are there was any steps I need to take to stop any active yeast before putting it in the keg and ...
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Yeast for very high gravity (1.138) stout

I'm planning to brew a very high gravity stout. I'm expecting an OG between about 1.118 and 1.138 depending on how much my efficiency suffers. I've done this before with decent results, but I think I ...
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Attribute taste variation to volume of bottle?

This is not exactly a home brew question but this site seems to be the best fit in the stack exchange network for it. You can home brew the beer in question with a kit produced by the brewery though ...
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183 views

How well does liquid yeast travel?

I have often heard people talking about the viability of pitchable liquid yeast either in a vial or smack pack dropping over time. This effect is greatly accelerated with increased temperature, so ...
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Chilling wort before pitching yeast

I know it is important to chill wort to <80 before pitching yeast, and that quality of final beer is affected by the speed with which the wort was chilled to this point, and there are various ...
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Yeast , dead or alive?

G'day , how long after the fermentation has finished does the yeast live ? I am curious because not only is it the cost of the yeast but if you find a particular strain and you like the taste ( ...
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Is it necessary to aerate wort when pitching onto an existing yeast cake?

To my knowledge, aeration provides oxygen so that the yeast can reproduce before fermentation. If you're pitching onto an existing yeast cake, there should theoretically be enough yeast already to ...
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What happens when you push a yeast near its alcohol tolerance?

I'm brewing with Wyeast's West Yorkshire Ale yeast, which has a documented alcohol tolerance of 9%. I'd like to push that boundary by brewing an 8.5% ale and wonder what to expect. Common sense says ...
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187 views

When should I hydrate my dry yeast?

I'm brewing beer tonight (in roughly three hours) and I've decided to try rehydrating my dry yeast instead of throwing it directly into the cooled wort. If I boil a couple cups of water, how long does ...
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Dry Hop Filtering and bottling

This is my first attempt at dry hopping. I added hop pellets directly into the secondary fermenter. They have been in for 1 week and many have settled to the bottom, however there is quite a bit ...
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1answer
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Can ale yeast be used weeks after it's opened (Safale S-04)?

Second-time brewer (to be). When I did my first kit brew, I didn't want to mess anything up, and the instructions I was following told me to avoid the yeast sachet taped to the top of the LME can and ...
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How do I know when a starter has hit 'high krausen', when using a stir plate

I've been advised to pitch an alcohol tolerant yeast "at high krausen" into a barley wine where the fermentation has slowed (OG 1.101, now 1.035). But if I've got it on a stir plate, how do I know ...
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WLP 566 Saison Long Fermentation

I brewed up a saison/BGSA 13 days ago, OG of 1.088. Don't have the grain bill/fermentables handy, but there was a good bit of sugar/highly fermentable adjuncts. Pitched a 32oz starter with this ...
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oxygen and yeast pitching rates

Many online references, such as BYO, mention that oxygen is needed by yeast to reproduce, and that a wort with low dissolved oxygen levels will have longer lag times and less attenuation. This might ...
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1answer
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Premature fermentation of wine must. What to do?

I recently took delivery of a five gallon pail of white wine juice. Supposedly, the juice had been refrigerated on its trip from California and stored in a cool warehouse here in my home town. ...
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Yeast Starter with Corn Sugar?

Anyone try making a yeast starter with Corn Sugar instead of DME? If so what proportions of corn sugar did you use? I am planning on brewing a high gravity stout, and don't have any DME for the ...
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1answer
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How quickly do I let the fermentation temperature rise if it starts off too low?

I brewed something like a Black IPA today (hoppy and dark). I ferment in carboys in a chest freezer with an external temperature control. It is frigid today, and the garage where the chest freezer ...
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Is oxidation of yeast starters a concern?

We all know oxidation is bad, and cooling hot wort is particularly susceptible to this off-flavor-producing problem. the question is; does oxidation matter for starters? I use a stirplate to aerate ...
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Why re-pitch light to dark?

It is often said that, when re-pitching yeast, you should generally go from low- to high-gravity, and dark to light beers. When I repitch, I use trub directly. I understand why using a yeast from a ...
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Honey/Ginger Brew With Champagne Yeast

I got it in my head last weekend that I needed to homebrew again (it's been more than 10 years!), and so I boiled 4lbs of honey, 2lbs of ginger, 1lb of dark brown sugar and 1.5lbs of raisins (since ...
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US-05 Fermentation Temperatures / Top Cropping

Brewed a 1.060 OG IPA last night (extract), pitched a packet of US-05 reconstituted with 5 ounces of water. Pitched at 68 degrees, but I wanted a clean fermentation with minimal esters, so I have the ...
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542 views

Fermentation hasn't started?

Made a kit on Saturday, 1/2 lb. Caramel 80 specialty grain, 9.15 lbs rye extract. Kit came with the Wyeast American Ale smack pack. When I got the yeast pack out of the fridge, the pack was already ...
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Bottling high Alcohol beer

I have been researching this on some blogs and have seen info on this topic but not an answer to this question. I have brewed a 10.6% Belgian tripel with an FG of 1.02 about 6 weeks ago (secondaryed ...
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1answer
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If some of the yeast doesn't get into the fermenter does it matter?

I just made my first home brew. I have learned many lessons including that if I move the fermenter to its resting place after I add the yeast some of the yeast gets stuck to the glass, and I can't ...
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Cold and Hot Break

OK I have been brewing for over 2 years, and have cranked out around 40 batches. Trying to really hone in my process and improve the quality of what I make. I am literally reading (and re-reading) ...
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Can I dry my own yeast to make it relatively shelf stable? How?

Obviously, it can be done, as dry yeast works for fermenting beer. I go sometimes a month or two between batches, and carrying over one yeast culture across beers seems a bit of a pain. How is dried ...
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Dry yeast vs wet yeast

I've always thought it to be common knowledge that wet yeast is better than dry yeast for home-brewing. This was confirmed by Sam Calagione at his Authors at Google talk where he suggested that using ...
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Fermentation started, then stopped the next day. Is my yeast dead?

This is my first shot at homebrewing, using Northern Brewer's American Wheat Beer kit which is based on liquid malt extract, Willamette and Cascade hops, and a packet of dry yeast. I brewed and put ...
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Can I compensate for pitching too much yeast?

I just pitched a whole 35mls vial of White Labs WLP001 California Ale Yeast into a 1 gallon batch of brown ale wort. I only intended to pitch half of the vial, but my brain turned off at exactly the ...
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Can you add more yeast into a batch of cider if you think you've killed it?

Ok, so I’m really new to this I started off making cider Since I juiced my own apples, I used the method of pasteurisation that kills off wild yeast by heating the gallon of juice on a stove while ...
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What changes needed to recipe when switching Ale to Lager yeast

I plan on brewing a porter next week that calls for a American Ale yeast. But my basement temperature would be perfect for using a California Lager yeast (aka Anchor Steam yeast). I've seen some ...
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Phosphoric Acid Wash for Yeast

I love recycling yeast, see it as a great way to save money, and if you find a good one, they are great to use over and over again. I was chatting with a guy in my homebrew club who is a distiller ...
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When bottle conditioning, when should I re-yeast, and how much yeast should I add

I have a Chocolate Cherry Stout that is currently in secondary on fresh Cherries. It has been sitting on the cherries for 2 months now. As I prepare to bottle I want to be sure I have enough, healthy ...
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Is my Kolsch still a Kolsch if I used the wrong yeast?

I followed Jamil's Kolsch recipe to the letter but pitched WLP 833 into my carboy thinking it was a Kolsch yeast. I found out that it's actually a different German yeast strain. Will this still be a ...
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Low original and final gravity

My roommate and I brewed our first batch of beer, a Rogue Dead Guy clone (with some substitutions). The brew has finished secondary fermentation and our hydrometer reads 1.007 (temperature-adjusted). ...
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Fermentation stopped but beer seems too sweet - why?

My last beer went through a normal 10-day fermentation process and afterwards there was no activity. I assumed that most of the sugars had been consumed. But after I bottled my beer and let it ...
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2answers
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How do I estimate the viability of dry yeast?

I've seen plenty of data and apps that help you estimate the viability of a liquid yeast culture. But I haven't seen a lot of data about dry yeast. I like using dry yeast for 1 gallon test batches and ...
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using champagne yeast as a secondary yeast for fermentation?

I haven't quite found a post that answers my question, when brewing a big beer such as a barley wine I have heard talk about using champagne yeast after the initial yeast has done all it can. If my ...
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Commercial brewery house yeast

I know a lot of breweries have a house yeast that they use, and in some cases it's their only yeast. I've also heard that most will only harvest up to six generations, due to weak flocculation and ...
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How to ferment on the last batches yeast cake?

My last batch was a strong ale/winter 1.090 wlp002 english ale yeast brewed on 11/20 (two weeks ago). it has been in the fridge crash cooling for about 72 hours. this will be my first attempt at ...
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Brewed with honey and the yeast is not working?

I did my first beer using honey last night and the beer is not bubbling this morning as it usually does. Is this normal? Should I re-pitch the yeast or not?
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Salvaging flat beer?

I recently brewed a Schneider Aventus clone and the end result was a flat beer. I missed a step in the instructions to add a fresh dose of yeast a few days before bottling so I'm assuming that this is ...
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Possible Stuck Fermentation

I'm attempting to brew a high gravity stout, OG 1088. Its been in the primary for two weeks. I assumed it had completed fermentation since it feremented extremely vigorously, so much so I had to use ...