If you mean live trees, call your local garden center that sells trees. The one here always has a bunch of tall trees, but they sell really early, and you have to call to 'reserve' one of them. But tall trees aren't that budget friendly (and I'm in CT, so it's not like they are traveling as far as they would if I lived somewhere down south) Even a regular 6" one costs about $50. The year I had a 9 foot tree, I paid close to $100 for it.