Fermentation not starting

Fermentation not starting

Post by Mark » Sat, 19 Oct 2002 08:46:20

I've got 4 equal sized batches of grape juice, (gewurz, seyval,
merlot, and cab).  All but the merlot are fermenting fine.  I
sulphited each batch 1/4 teaspoon per 5 gal and waited 24 hrs before
stirrng in the hydrated yeast.  I added nutrient to each batch as per

The ONLY variable is that I used Pasteur Red for the Merlot (as per
supplier recommendations) and Montrachet with the rest.  Does Pasteur
Red result in a slower or delayed fermentation?

Mark L.  Buffalo-Niagara USA


Fermentation not starting

Post by Jack Kell » Sat, 19 Oct 2002 22:23:23

> Does Pasteur Red result in a slower or delayed fermentation?

In a word, no.  The problem, I think, is simply a bad sachet of yeast.
 Either it got too hot, too cold, or is simply too old.  If there are
even a few viable yeast cells in there, it will eventually start --
but it might take a long time.  Try another sachet.

Also, you would have known within two hours if your yeast was going to
start or not if you had just made a yeast starter.  If you aren't sure
how to do it, go to http://winemaking.jackkeller.net/glossary.asp and
scroll down to (what else?) "Yeast Starter."

Good luck.

Jack Keller, The Winemaking Home Page