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Canning -- Miscellaneous
I have an old recipe that calls for adding a grape leaf to each jar of pickles. Why?
Grape leaves contain a substance that inhibits enzymes that make pickles soft. However, if you remove the blossom end of the cucumbers (the source of undesirable enzymes) you don?t need to add grape leaves. Source: Original FAQ posted at http://hgic.clemson.edu/factsheets/HGIC3101.htm