A fermentation is “stuck” when it fails to reach the desired conversion level of sugar, usually coming to a halt somewhere below 10 °Brix. It does not refer to a failure to start,
In the June-July 2019 issue we explored some of the most common wine faults you are likely to encounter, whether during your personal winemaking journey or while tasting the wines of others,
Viognier can be a bit of an odd duck. Like Riesling, it can get some of those weird petrol/gas like aromas, and that’s just natural, from the grapes. Like Sauvignon Blanc, it
Why do we subject our wines to competitions? Is it for the professional feedback? Is it for the tasting notes? Is it for the bragging rights? Regardless of your reason to enter
That’s a great question as we approach the harvest season. Though I don’t expect 2019 harvest to be like 2011 or 1998, many of us all over the country, from Oregon to
All photos courtesy of Shutterstock.com It is not lost on the well-informed winegrower/winemaker that fungi — ancient, single-cell organisms that have been on this planet hundreds of millions of years longer than
Before I launch into my information about gum arabic and related products, do take a minute to think that gum arabic may not give you the result you’re looking for. Gum arabic
Whether you make wine at home, commercially, or simply enjoy drinking it, it’s likely you have encountered faulted wine; maybe it was the subtle aroma of geranium leaves, an aromatically muted glass
A I agree with you in that acid adjustments, especially big ones, can best be made in two steps. That way you can see if you like the result as you go
The Wizard explores the many sensations that tasters experience as a wine goes from grapes, through fermentation, and into the early stages of aging; in order to be a better judge of a wine’s character when finished. Also, a reader has a question about properly adding acid to a barrel.
I apologize in advance for the lengthy response but this is a fantastic question and I really wanted to flesh out my answer for you and readers that are following along. You
Q How do I get copper sulfate in accurate diluted food grade form? I would like to treat 5 gallons (19 L) of stinky fruit wine to get rid of the rotten
Volatile acidity (VA) is a flaw that can ruin the aroma of a wine. Explore what exactly VA is, why it is such a problem, and techniques to avoid VA in the future.
There are some winemakers who practice the age-old philosophy that the wine will take care of itself . . . but for those who want to produce the best wines possible, monitoring is key. Bob Peak takes readers through the what, why, and when for testing your wines.
Well, it seems like you have been paid a visit by a colony of Acetobacter, aka acetic acid bacteria. They love air, eat alcohol, and turn it into carbon dioxide and vinegar.
You’re absolutely right, raised corks can either be a problem (if they’re too high, or too high of a percentage from bottle-to-bottle) or it could be nothing at all. The devil is
Q I have a Merlot to which I added SO2 thirteen days ago and it smelled ok. but last night I pulled a sample and it had a bruised apple smell and
Hmmm, it sounds like you’ve got a little bit of sugar left there. I would start, however, with a quick check of your numbers to be sure. A °Brix of -1.0 (0.995
Oh boy, oh boy, oh boy. Sounds like you have a lot of sulfur dioxide in that wine! Assuming standard FSO2 for bottled wine being around 25 ppm, am I correct in
Before you start going crazy with a fermentation restart protocol, are you sure that it is really stuck? The first thing that I would advise you to do is to taste and
It sounds like you are doing the right thing. This is probably an aerophilic “flor” type yeast that is eating alcohol, and in the presence of air (if it was slightly untopped)
Well I like your moxie. Sometimes it takes a little thinking outside the box to really make our beverages sing, and in your case (though it would be anathema to a commercial
You are more in the right here than your brother; when buying wine at a restaurant you really just smell and taste the wine. If the wine smells and tastes fine to
Not knowing any more information than you give above, it’s tough to make specific recommendations so I’ll start with the general ones. Whenever you suspect VA (volatile acidity, or the production of
In the old days we would use paper chromatography to monitor the completion of malolactic fermentation (MLF). We dotted little drips of the sample wine, along with liquid standards of malic and