Is it a problem of kilayim to have a grape vine running over a nana (spearmint?) plant, I think the Iranian Jews eat nana ?
Nana is mint, and in the terms of the Mishnayos ( Sheviis 7-1) it is called “Dandana”. Mint is considered edible to humans, and therefore it would have an issue of kilayim and shemitta. Mint is used as a flavor even for westerners, even if they don’t put the actual mint leaves into their tea, they use it to flavor foods in other ways. Therefore you should not put a grape vine over mint leaves.