The cost of Christmas trees at Lowe's varies depending on the type of tree, its size, and any additional decorations or accessories that may be included. On average, a 6-foot artificial tree can range from $30 to $150, while a 7.5-foot tree can cost anywhere from $50 to $300. Live trees can also be found at Lowe's, with prices starting around $20 and going up to $100 or more for larger trees. It's best to check with your local Lowe's store or visit their website for specific pricing information.