I freeze mostly berries and cherries and some other fruit for wine before steam juicing and never treat the fruit....
I think if you would cut up apples, peaches, etc....I would just spray them with K-meta solution...I think Bert and PWP might spray theirs, someone said that once..?
Otherwise like Wade, add it when you thaw them out.
For peeled/cored/sliced apples for pies and apple crisp I have just either left them alone, or splashed some lemon juice on them....Both are fine.
Edited by: Northern Winos