You need a very tart wine, high in malic acid, for MLF to be sucessful- otherwise the wine just tastes "flabby" and boring.
Apple wine is a good one for MLF if you want to reduce the tartness in the wine. Chokecherries might work, but I've never tried it. I've made hundreds of gallons of chokecherry wine, but my favorite way is dry and with a little oaking. I don't know if I'd like it after undergoing MLF.
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