Supposedly, it can be a challenge for some people to identify wild grapes instead of the poisonous moonseed or Virginia Creeper, but I don't think it is all that difficult. I don't think I've ever seen moonseed, but we have plenty of Virginia Creeper around here. For more info, read this blog post here. I picked about 3 pounds of grapes last weekend, and then I consulted my trusty The Joy of Jams, Jellies, and Other Sweet Preserves
Wild grapes, unlike domestic grapes, are high in tartaric acid (from which cream of tartar is produced), will form crystals in the jelly so you need to let it settle out overnight before making your jelly. After cooking down the grapes, strain out the juice and let it sit in a container in the fridge. I actually let mine sit for a week because I couldn't get around to making the jelly anytime during this busy week. I let it pass through the jelly bag yesterday afternoon and it left a ton of sludge in the bag. Who knew? If you eat a lot of wild grapes raw, this stuff is what makes your mouth feel dry and cottony.
Wild Grape Jelly
makes 3-4 half pints
3 lb. wild grapes, stems and all
1 c. crab apples, halved, (cut of stems and blossom ends, but leave the seeds in)
Heat grapes and apples in a large pot until boiling, mashing as you go with a potato masher. Boil for 15 minutes. Strain and let remaining juice settle overnight. The next day, strain juice through a damp jelly bag for 2-3 hours. Add:
3 c. sugar
Heat juice and sugar in a large pot (I like to use an enameled cast iron dutch oven
Pour jelly into clean hot jars and leave 1/2 inch headspace. Process in a boiling water bath canner for 10 minutes.
I was a little nervous because it didn't appear to be setting up yesterday, and so I was envisioning having some jars of grape syrup instead of jam, but when I checked it this morning, it was set! Sometimes natural jellies (no boxed pectin) take longer to set up - up to a week!
Since I have read that wild grapes can continue to be harvested until after the frost, I can probably make some more jars every weekend when I have time. It will make great Christmas gifts!