Any muscadine growers out there? I am growing Ison, a higher lattitude variety of Supreme. My vines do great every year. Highly productive, very little disease, etc. Its July 28. I just went out and looked at the vines, and there are immature grapes all over the ground! Perhaps 20% have fallen off! If I gently shake the vines more fall off. We have had sufficient rain. No big differences from years past. I see no fungal issues. Perplexed. Looking for an explanation. Thanks for any offers.