BB2K and I are trying an experiment. There is a wild grape vine all up in an ornamental cherry tree in our side yard, and it is bearing like nobody's business. We've decided to try our hands at making jelly. So far, we've picked 15 pounds of grapes, and there's still a lot more up there.
BB2K has accused me of deliberately bombing her with grapeshot; I wouldn't do that, would I? Not me. . .
We've got enough "owies" around here; had the vet out yesterday for the horses' fall shots. Betsy and Blondie both react badly to the shots, so they are pretty sore today. We'll be doing banamine for the next couple of days with them. Shots and Coggins tests for 5 horses - that's a major "yeeouch" for the ol' wallet, too.
If you include some hard green grapes, then you do not need any commercial pectin.
With jelly, follow recipe, enough green grapes and it jells perfectly.
For jam, keep the green ones separate in a cheese cloth bag when boiling them all.... After they have been boiled, remove bag of green grapes, squish all possible juice into pot, then discard.
As to ratio.... Ah......ah...... Maybe about 20 to 1