I've never planted a live Christmas tree but have often thought about giving it a try. Maybe when my children are a little bigger
I've also wondered how late you can plant a perennial. I suppose it depends on what the weather is doing in your area. I have a bunch of bulbs to still plant but we've had frost for almost a week straight. It's supposed to warm up a bit this week so hopefully I will get them in.
I don't know about Florida. Just yesterday I planted a camellia and a lemon tree as well as an alamanda that has been sitting in a pot.
In New Hampshire, which is more to the point, I tried to get them in the ground in September to get a little root growth before frost. Amid is in a different climate than NH. The later you plant tulips the better. Daffodils go in first.
November is as late as I've planted perennials here in the Northeast. We have planted Christmas trees a few times. They all grew to be great big beautiful trees. We (huh, that's DH not moi) dig the whole before the ground freezes,keep it in the house for a short time and refrain from using too many lights. Might again this year. Better get digging
I have planted bulbs in November.. but I generally do not plant during the fall. I am too busy putting the gardens to bed for the winter. Cleaning up dead foilage, weeding, adding compost, and protecting the more vulnerable plants.