You can grow grapes on anything. What do you think?
My son and I were at the recycling center dropping a load of metal from our storm smashed shed when I saw a children's jungle gym sitting over in a corner of the yard. I asked if they'd sell it to me. He said he would - for two dollars. Later, he gave it to me for free because we'd brought so much metal in. Took it to my backyard and painted the whole thing in dark green paint and planted grapevines at the foot of the jungle gym. The first picture is the gym when I brought it home. The second is spring time when the grapevine is starting to grow. I don't have a picture of it in it's full glory but it's given my family and neighbors plenty of grapes!