Fermaid O

Fermaid O

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Fermaid O is a newer formulation of the same Fermaid K that winemakers everywhere have learned to trust their ferments to. The main difference in composition between the two, is that the Fermaid O has replaced the inorganic DAP with an organic source. In terms of how this benefits the winemaker, there are several points!


  • Organic Nitrogen is easier for your yeast to digest, resulting in a smoother, more consistent fermentation.
  • Fewer fermentation spikes means better yeast health, and the ability to ferment to its full capacity.
  • Compared to DAP, Fermaid O will result in lower heat output from the yeast, and lower levels of negative sulfur compounds.

This is a nutrient which will boost the quality of wine, regardless of process. Lower heat production, less negative flavor compounds, better overall fermentation kinetics and flavors!

To Use:
Use at a rate of 1.5g / gal of must/juice.

Community Q&A

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Browse 1 question Browse 1 question and 50 answers
Why did you choose this?
MoreFlavor Store
Same as for yeast
Jim S on Apr 15, 2019
thought I'd try
Edwin W S on Mar 25, 2019
Same as for yeast
Jim S on Apr 15, 2019
history of good results
michael a on Apr 10, 2019
thought I'd try
Edwin W S on Mar 25, 2019
Organic nutrient used in mead and wine making.
D A on Mar 14, 2019
Industry Standard
Colton M on Mar 7, 2019
I often follow a TOSNA protocol when making mead.
Kenneth Hesser on Jan 8, 2019
Making mead
Matt on Jan 1, 2019
Yeast nutrition during fermentation.
Dan L on Dec 18, 2018
Healthy fermentation make good wines
Scott H on Dec 15, 2018
Bray Denard from Denard Brewing said it makes the most aromatic meads
Susan K on Dec 12, 2018
Starting to do meads, and this seems to be the most frequently recommended nutrient for SNA
Ian C on Nov 27, 2018
To fill out the minimum order for free shipping
Crue K on Nov 24, 2018
Best price I could find on this nutrient for wine fermentations.
Brian J on Nov 20, 2018
I bought this to make mead and this is an important part of the process.
Jarrett R on Nov 17, 2018
Patrick S on Nov 17, 2018
for a friend
Gary p on Oct 25, 2018
great for yeast in ciders and meads
Corinne T on Oct 22, 2018
Easy to use ,proved good result in red wine making.
Yin Min H on Oct 20, 2018
Learned it's a better choice than Fermax
Gene C on Oct 15, 2018
Mead is my jam and Fermaid makes it smooth. Ready to drink faster using Fermaid O.
Brian K on Oct 11, 2018
Recommended from friend
Chris M on Oct 5, 2018
Heard good things.
Zach W on Oct 5, 2018
Fermentation Insurance
D O on Sep 25, 2018
already have some but to make sure I have enough of this great product
Richard Robinson on Sep 21, 2018
I have been ising for years with good results. Never had a stuck fermentation or off flavors.
David P on Sep 21, 2018
it was recommended by MoreBeer!
James K. R on Sep 19, 2018
used prior
richard r on Sep 14, 2018
good food for the must
Michael C on Sep 13, 2018
Robert M B on Sep 11, 2018
Size of batch
John G on Sep 10, 2018
your site recommended
ron D on Sep 10, 2018
Didn't want DAP
Michael M on Sep 10, 2018
Prefer the version without DAP
Matthew R on Sep 6, 2018
trying to stay organic as much as possible
Bernard L on Aug 31, 2018
just been a better syetem for me to start yeast
shawnte a on Aug 30, 2018
Replacement order.
Bob De L on Aug 28, 2018
Doug J on Aug 24, 2018
perfect food for yeast at 1/3 the way through fermentation
James D on Aug 23, 2018
Works for wine production
Steven E on Aug 22, 2018
Recommended over Fermaid K for mead making and low nutrient ferments
Scott B on Aug 22, 2018
This organic product insure the yeast will have enough nutrients to complete primary fermentation.
Chris M on Aug 21, 2018
Provides an Organic Nitrogen source
Chris H on Aug 15, 2018
yeast food
Jason W on Aug 10, 2018
love it
Valued C on Aug 10, 2018
Good product
Valued C on Aug 4, 2018
recommended at checkout
Webb G on Aug 1, 2018
trying this
Jim S on Jul 31, 2018
gino p on Jul 24, 2018
Good nutrient supplement
Frank F on Jul 24, 2018
generic yeast nutrient mid fermentation
ALEXEY S on Jul 24, 2018
history of good results
michael a on Apr 10, 2019
Organic nutrient used in mead and wine making.
D A on Mar 14, 2019

4.3 / 5.0
11 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Prefer the K
Fermaid O is much harder to dissolve than Fermaid K. It clumps and sticks to the measuring spoon. The results are fine but this is step down from Frmaid K.
November 8, 2018
6 months ago
Fermaid -o no
Arrived caked and undisolveable , haven’t had that trouble with Fermaid K
October 24, 2018
6 months ago
First time experience
I just used Fermaid O in a batch of Black Raspberry (which I grow) wine. I had a good but not foamy fermentation. Fermented down to SG 0.992. So, based on this one experience, I can recommend it, as it does it's job. Bigger tests for it as the harvest season approaches... Cheers!
August 10, 2018
9 months ago
Fermaid O
Thanks for the fast service! This nutrient did what was supposed to do! thanks!
July 6, 2018
10 months ago
Highly recommended for cleaner faster drinking mead with staggered nutrient additions
February 22, 2018
1 year ago
Working as expected so far
I'm using the Fermaid O as my sole nutrient in the mead. Way to early to judge how it will come out, but it seems to be fermenting as expected.
February 20, 2018
1 year ago
Great product. Does the job, and it’s organically derived.
January 31, 2018
1 year ago
fermaid o 120 g
product as described, fast shipping
January 28, 2018
1 year ago
Major Improved Mead Fermentation
This product has been the biggest improvement in my mead fermentations so far. I first used this with DAP but have recently moved to an all Fermaid O fermentation and my meads have never been this clean tasting so early. I cannot recommend this product enough.
January 24, 2018
1 year ago
Just what the doc ordered
This product does very thing it says it does. I would risk fermenting without it!

August 30, 2017