I purchased my grape vine about 3 years ago. The package indicated that they are green grapes. I don't remember what the exact name is although it came from Walmart so it probably didn't mention any particular strain. Anyway this is the 1st year that it has produced clusters of grapes and there are a lot of them! The problem is that most of them have little black spots on them. What in the world is this? And why would there be several purple grapes in each bunch? Thank you very much, Terri
