Even though this tree is native to the western and southwestern United States, it is one of the best firs for this area. The Concolor Fir is able to withstand heat, drought and cold equally well. It also has a pleasant appearance with soft, bluish-green, needle-like foliage. Crushing its foliage releases a strong, lemon-balm aroma. Its cones can be 3 to 6 inches in size and have a pale green and sometimes purplish tint.