Q. Who is the vendor selling metal wall garden boxes at 2015 flower show?
Vendor at booth 520 sells the metal wall gardens. See attached photo. I talked to one of the salespeople at the booth and was told that they only sell at shows. They do not have a web site and they do not do mail order, so I am afraid that you won't be able to get this product from them. But at least you have a photo and can perhaps find something similar online.
Sorry, that's the best we can do for you.