Well, that's a great question. Christmas trees go on sale at Lowe's typically around the month of November. The exact date can vary from year to year, but it's usually right before the holiday season begins. You can expect to see a wide variety of Christmas trees at Lowe's, from artificial trees to real trees. Lowe's also offers a variety of decorations and ornaments to help you decorate your tree. So, if you're looking to get into the Christmas spirit and put up a beautiful tree in your home, then be sure to check out Lowe's for all of your holiday needs!