Strongest Fragrance: Grand Fir According to the National Christmas Tree Association, the grand fir reaches as high as 300 feet, making it one of the tallest firs. "It is easily distinguished from other Pacific Northwest firs by its sprays of lustrous needles in two distinct rows," they note.

Grand Fir With a thick branch structure and spaced branches, this tree has more of a bulbous middle portion than a thin silhouette. With what is considered the strongest of all Christmas tree scents, the Grand fir gives a grand impression that is hard to compete with. They last about 4 to 5 weeks after harvesting.