I'm guessing your interested in plants/trees that can be used successfully indoors (i.e., tropical plants). If that's the case, you might consider Norfolk Island pines (Araucaria), or Ficus benjamina. If I think of any others, I text back. Good luck and congrats!

You might want to check with a florist, rent them for the wedding. There also might be artifical tree shaped foliage that could be mixed with plants, for the dense green look, hold up the decorations you want to use.

I can't think of any tree or bush like you describe, that is hardy in your area. They would not make it thru winter without a greenhouse. Rented stuff gets returned, no loss of money for you, don't even have to bother with it when the wedding is done with!

Again, I would check to rent the foliage first. The Wedding folks have huge selections to offer, often inexpensive if you rent other things too, "a Package Price". Then check at the stores for foliage plants in the fake flower sections. See if you find what you like, create your own and decorate it with crystals ahead of time. Anything you can do ahead of the DAY is less stress, time saving. All those little jobs of "only takes a few minutes" can go bad real quick, turn into a race of time with any distractions or glitches. Renting or artificial plants that can be set in place are a lot less headache.

I am saying this because I have seen some weddings that had major problems occur! My sister-in-law's wedding was canceled when 3FEET of snow fell the day before. The whole state was paralyzed. Her father offered to get snowmobiles to take them to the church and she turned him down. Said she had not gone thru all that planning to have a wedding with a dozen folks!! So a double bill on the flowers, church, hall, for the wedding to take place the next weekend. I guess the delay made for a better anniversary date, they are coming up on 31 years this month.

Other weddings we arrived at, had to help quickly set things up because the bride had overplanned her decorating ability or someone in the plan didn't work out as scheduled. LOTS of stress on everyone, instead of flowing smoothly, with happy faces.

I got beautiful artifical flowers for my wedding. Made of wood fiber, you couldn't even tell holding them. Got the kind of flowers I wanted, lilies, real were horribly expensive in winter then. Almost all mine were fake, with just a few real blossoms in my boquet. So good, no one could tell. Afraid of having weather cancel us too! Florist arranged them and they were nice house decorations for a while afterwards. Got lots of compliments on the flowers at the wedding and later too.

Best of luck to you and the wedding!