easily thru thxgving ... but the longer you wait.. the colder your hands will get.. and that is the ONLY down side ...

get it done.. water deeply at planting .... and mulch if you can ... there simply wont be any heat to dry the soil in the root zone thru ground freeze ....

no reason to kick yourself.. you are still spot on on proper timing ....

nice link below on proper planting ...

leaving for the UM hockey game in an hour.. probably drive right by you ... if i see anyone planting an arb.. i will blow the horn... lol ....

ken

https://sites.google.com/site/tnarboretum/Home/planting-a-tree-or-shrub

ps: you dont mention size or soil type ,... maybe a stake ... just so it doesnt blow over ... remove in spring ....