You can have your tree up for four to six weeks and not worry about it drying out," says Darin. "Many people spend hundreds on decorations and on a fresh cut tree can only enjoy them for about two weeks—then the tree is dried out and really should be removed from a home," he says. But for artificial trees, there are no rules. "You can use the tree for multiple seasons, not just Christmas," says Essix. I had one for Halloween, Easter, and Valentine's.