not sure about your state / area but the local botanical garden lists this invasive as a NO PLANT for Missouri. Besides that, until proven otherwise, I bet this Capitol Pear will hold a split apart and attack nearby fences like its Bradford relative. Is this a 4x4 square of dirt Surrounded by pavement you will be planting a tree in? There are columnar oaks and maples but I would tend to want to stay one step smaller if planting in such a tight spot. Acer gresium, paperbark maple, or the right Acer japonicum, Japanes maple cultivar might look great if hardy for your summers. Here is a link that might be useful: MOBOT capitol pear

the kumquat was fine before i repotted it, so i'm thinking it must have been something i did (nothing happened to the mandarin tree though, and they were potted exactly the same way). i repotted it again yesterday, but left out the fertilizer. today i ended up cutting off the rest of the dead/dying twigs, and i'm left with 2 branches that haven't turned brown *knock on wood* though a couple of leaves have fallen off. i never noticed bugs or anything on it. will the twigs grow back eventually, or will i be left with practically a trunk? i did find a few egg cases (i think) on the lemon tree and i cut off the twig (they were all on the same one). there was a little sticky substance near where the twig meets the trunk. there was one more on a leaf further up, so i just plucked it off. there are only a couple more yellowing leaves right now, on the inside. the leaves towards the ends of the branches are dark green.

Could be carpenter ants, a rather interesting organism in that they farm fungus. So, bits of this fungal mycellium are carried to new areas of wet or partially-decayed wood, be it in a tree somewhere, somebody's house, etc. The ants don't eat the wood directly, preferring to allow the fungus to do most of the digestion, which is then consumed. I'm a big fan of eating mushrooms, so to my way of thinking, these ants have good taste. What's not so good is finding they've set up shop somewhere in your home. But short of that, they are doing you no harm. Very occasionally, carpenter ants can contribute to branch failure on a tree in which they've got a colony. But it is far more likely that they will go about their business without ever impacting you or your property. +oM

it NEVER hurts.. to put harden off a plant for a week or so .... avoid opening the box and running out and planting it ... first.. where did it come from .. and compare to your location .. odds are.. its coming from a much warmer zone.. so harden it off .. besides .. theoretically .... in our zone.. you could have frost or freeze.. for another week or two ... and though it might not kill it.. it wont do it any favors to lose all its leave right after a transplant ... so put it on the north side of the house .. outside .. for a week.. a little sun any time other than the intense hours of afternoon.. is good enough ... i agree its probably unkillable.. but why risk it ... my only caveat .. is that it will probably become a hard tree to garden under in the decades to come.. so site it where you dont care about what you plant under it.. e.g. its aggressive roots would make it inconduscive to growing hosta under .. but there would be plenty of of things that will grow there .. ken