You likely already know this but just in case... Muscadines do not reach their full potential for flavor and sugar content until the shine or gloss has been replaced by a very dull or drab appearance.
I have a 5 gal batch in a carboy that is pure juice from a steam juicer. It took about 80# of mixed muscadines for the batch. This is my first attempt using 100% juice.
Sounds like a plan. You're using pure juice, are you going to press or steam juice?
My vines didn't produce as much as normal this year, maybe I over pruned them.
I zested 12 grapefruit as you did and used a pint jar filled with ever clear. I only had to add 5cc to a 2 gallon batch of grapefruit wine to make a astonishing difference. I've also done tangerines but haven't used any yet.
I also got rid of the supreme. Darlene is OK just not a heavy producer... I've had those since 1999. Black beauty is a heavy producer and real good for fresh eating...I've made wine with them but nothing to brag on.
Ison is a better wine grape for me anyway. Sugargate is my favorite for...
I don't have sweet Jenny but I do have one Pam. I can't tell the difference between Pam and Darlene... Well not much anyway. So what have you pulled up?
I have 2 vines of q21b17 grapes that were salvaged from the LSU ag dept when they were trying to develop a wine grape for the south. It's a...