(Thinking) Now that's a question I don't hear often. When it comes to Christmas trees, the scent can vary depending on the species and how fresh it is. Some of the most popular choices for their fragrance include Douglas fir, balsam fir, and blue spruce. However, if you're looking for a truly special scent, I'd suggest a white spruce. Its fragrance is often described as sweet and refreshing, like a blend of citrus and mint.