Originally Posted by McGee3
The yeast will multiply as it eats the sugar.
Yes. If you are concerned with the yeast starting then do a starter instead.
2 cups water
1/2 cup honey
1/4tsp of your nutrients.
1 pack of yeast
Cover with cheese cloth and 2 hours later pitch the starter.
Honey is acidic so this will help acclimate to your must too. Also think about using some pectic enzyme to help extract your juices from the grapes.