I took some cuttings from a friend this year and was pleasantly surprised when they grew so easily

I did unfortunately kill 2 of them because the rain couldn't get to them but that's ok since 2 made it and I don't really have space. The one has done particularly well and the other, while small, is healthy.
In the mean time I'd like to know how long I can keep them in bags and how to feed them.
Maybe I should photograph the fruit on the parent vine to get you guys to confirm that it is a Catawba for me. lol