The price of real Christmas trees at Home Depot varies depending on the size and type of tree you choose. Generally, the prices range from around $20 to $100, with some premium varieties costing more than $100. For example, a 6-foot Douglas fir tree can cost around $30, while a 9-foot white pine tree can cost upwards of $60. It's always a good idea to check the Home Depot website or visit the store in person to get the most up-to-date prices.