They do make great white grape juice - just like you can buy in the store. Never tried making jelly out of them but I think I would mix them with other, more flavorfull fruit for best results, say strawberries or raspberries.

Dave

I imagine the white ones would make a more delicately flavored jelly.

My friends, being out of town at the time, gave me clearance to harvest and utilize their Riesling grapes. I made jelly out of them. The labels looked posh when I wrote "Riesling Grape Jelly". I didn't try any myself, but the person I gave it to said it tasted good. To each their own.

I made jelly from red seedless grocery-store grapes. I was a beautiful pink and very delicate-tasting, we liked it better than Smucker's. Then again, anything homemade is better. I'm going to try with wild (fox) grapes if I get enough this fall.