Hello. A couple weeks ago I bought a house that has two large grape vines in the back yard. I am noticing them starting to ripen and turn purple in color! Wondering if you could help me determine what kind of grapes they are, when the best time to pick them is, and how to care for them. I have a friend who saw them and would like to plant some of her own. Is there anyway she can take from my vines next year or would she has to start from scratch. Thanks for your help!