I would not make jam with riverbank grapes because the skins and seeds contain even more tartaric acid. You can eat the grapes raw and they taste fine – a bit tart. The seeds are crunchy and bland – kind of annoying but totally edible (and loaded with reservatol and fatty acids – grapeseed oil.)Click to see full answer. Also asked, are there any poisonous grapes?Grape vines and other parts of the grape vine such as leaves and roots are not poisonous to humans. Some poisonous plants, such as Canada moonseed, look similar to grape vines. All parts of that plant are poisonous and ingesting the plant can lead to seizures and convulsions.Additionally, do wild grape vines produce fruit? North American Wild Grapes The vines grow up and over trees, covering the canopy and blocking light from the leaves. Wild grapes produce fruit ranging from 1/8- to 1-inch in diameter in bunches or clusters of four to 10 fruits. While the fruits are edible, they vary from acidic to sweet. Subsequently, one may also ask, are all grape leaves edible? Grape leaves are edible if you pick them young in the spring when they first emerge. Later than that and there’s a good chance they’ll be tough.How do I know what kind of grape vine I have?First, all grape plants have heart-shaped leaves. There may be three or five lobes on the leaves depending on the variety, and the edges may be smooth or jagged. However, that tell-tale heart-shape is always present. Next, these vines will have tendrils that help the plant climb higher and higher toward the sun.