Those plants aren't bamboo--they are a species of Dracaena (sanderiana I believe). They are strictly tropical and wound not survive in the ground outside of zone 10.

Thank you for all your suggestions. I am not really looking to treat and keep the stump for decades. My neighbors were bringing down a tree and I really liked the look of the stump and wanted to put it next to the mailbox, I am okay if it rots in few years. My only concern is that one of the trees in our yard already has termites (a live tree which is blooming and I dont know why the termites were attacking a live tree.. thats a different topic though). We are about to start termite prevention plan around the house and I dont want to encourage more termite colonies by putting these stumps. So I was wondering if I can do something to avoid any new termite activity. If the best course is to not put them in the yard at all, I will be sad but okay with that too. Btw, we are in Zone 7, Maryland.

At least some! Perhaps a blower so that the BTU's actually come into the space v. traveling up the front? Or, perhaps tell us that this is for decoration only and suggest alternatives...like the heaters we eliminated in favor of the fireplace? These heaters seem to work in an open air environment; why not a fireplace? I am obviously not a thermal expert but I appreciate your comments. Thank you.

You have options! North side, have shine - powder-coated iron and hand-painted gold finish. This item includes two panels, to hang in a few ways. 2 panels, and each is 24 x 15 x .5” https://www.dotandbo.com/wildorchid/product/designs4comfort-magnolia-storage-ottoman-with-trays-tan-fabric?cacheBuster=1642497158&osky_campaign=end-of-page&osky_content=29