hot glue doesn't get much of a grip on polyethylene (what most plastic plants are made of), at least until thew polyethylene melts.
there are a lot of very realistic non-plastic fake plants out there now; check out a craft store, the craft section of something like Walmart, etc. those seem to be mostly wire and cloth, which hot glue should be able to grip
there are a lot of very realistic non-plastic fake plants out there now; check out a craft store, the craft section of something like Walmart, etc. those seem to be mostly wire and cloth, which hot glue should be able to grip