Well my goodness, if you have plums that sweet, it would be a sin to dilute them in any way. I just got 3.2 liters of juice from 10 lbs of red plums (store bought). They were 1.054 SG; not bad, but man you are lucky.
If it were me, I would not add or reduce acid. I would simply ferment to dryness and sweeten to balance, period.
Roger
I have a blue Mount Royal plum tree that is packed with 20 brix plums. I
> think a few more days and it may get to 22 or 23 brix. Can I make a wine
> with 100% plums, no water or sugar or would this be wrong?
> If so, what should I adjust my PH and acid to?
> Louise:o)
>
>