There will always be some yeast spores...of some kind...on the grapes.
Introducing a cultured wine yeast gives you a better chance of
obtaining a pleasant and predictable wine....the wild spores may make
great wine, but may just as often not make good wine.


Truenorth

On 8 Apr 2004 22:46:25 -0700, (Richard
Sydney) wrote:

>My father of italian origin has been making perfect wine for years and
>has not once used yeast. What is the purpose of adding yeast? What
>does it do?
>
>Richard Sulfaro