One of the easiest ways to reduce incidence of hydrogen sulfide development is by making specific nitrogen adjustments during primary fermentation. As mentioned in the last blog post, poor nutrient management can also lead to stuck fermentations. Years of research has shown winemakers that a must’s starting nitrogen concentration varies from year to year. Thus […]
Fermentation
What Causes a Stuck Fermentation?
Sometimes, a stuck fermentation is inevitable despite a winemaker’s best efforts to avoid it. Stuck fermentations are defined as periods of time during primary fermentation when sugar conversion unexpectedly slows down or stops completely (Iland et al. 2007). Maybe the wine takes off aggressively before the winemaker is able to gain control of the fermentation. […]
To Inoculate? That is the Question
On August 16, 2019 (4:00 PM, EST), the Darn Good Winemakers session will meet to discuss strategies surrounding a successful native primary fermentation. In the presentation titled: Successful Native Fermentation Strategies, we’re going to learn more about Potential risks associated with native fermentations. Best strategies for maintaining a healthy native fermentation. Developing a rescue strategy […]
2019 EWE Conference Recap
Formula Wine Production, Regulatory Challenges, and Yeast Selection As many of you know, I regularly attend the Eastern Winery Exposition (EWE) Conference. The conference gives me a chance to see what’s new among tradeshow vendors and catch up with many familiar faces. You’ll usually find me at the American Society of Enology and Viticulture – […]
YAN… to the Rescue!
It’s impossible to talk about the pending harvest without talking about YAN. Every year, I run into winemakers asking me what nutrient additions to make when they do not know their starting YAN, or yeast assimilable nitrogen (aka yeast available nitrogen). Not knowing the must’s YAN concentration when treating fermentation with nutrient supplements is equivalent […]
