You can sell Christmas trees in many different ways. One way is to set up a Christmas tree lot and sell trees to people who come by looking for a tree. Another way is to sell Christmas trees online through a website or social media. You can also try selling Christmas trees to local businesses or organizations that may be looking for trees for their own Christmas decorations. There are also other ways to sell Christmas trees, such as participating in a local holiday event where you can sell trees directly to consumers. Whatever method you choose, make sure you have a good selection of trees and a good price point to attract customers.