Ask Wine Wizard

Blending Stuck Wine


Denis C. LeBreton — Alamo, California asks,

In 2015 we had several days of very hot weather in Northern California right before harvest time. I couldn’t get my grapes off the vines fast enough and consequently my Cabernet Sauvignon and Petite Sirah came in at a very high Brix (29 and 30). They did not ferment out all the way so I tried to restart the fermentation with a high-alcohol yeast and Go-Ferm, with no success. I decided to press and SO2 the wine and save it to add to my 2016 harvest. My thought is to add 1 gallon (4 L) of 2015 Petite Sirah to 40 gallons (151 L) of must and 5 gallons (19 L) of 2015 Cab to 30 gallons (114 L) of must. Do you have any problems with my solution?

That’s too bad that you had some stuck fermentations. It’s probable that your yeast died out due to alcohol toxicity resulting from those high brixes. Next time make sure you’re adding enough water and feeding enough nutrients to create as healthy of a fermentation environment as you can. Before next harvest you may want to brush up on stuck fermentation prevention; there have been many articles published in WineMaker magazine on the topic over the years, and some are available by doing a search for the topic on As far as dosing in some of your stuck 2015 wine to future vintages, I have a few things you may want to take into consideration before trying it. Number one is something I’ve been saying for many years and that is, “Never blend a loser.” What I mean by that is: Don’t let a small percentage of a “bad” or troubled wine ruin a future batch. While I understand the temptation to try to salvage something from a winemaking project gone wrong, there are some real reasons why it’s not
Response by Alison Crowe.