With soft long blue/green needles, this tree is known for its great fragrance. It has been suggested that Concolor Fir is the ideal choice for those people who suffer from tree related allergies. White fir, also commonly called concolor fir produces a spire-like crown with a straight trunk. On older trees, the lower one-half to one-third of the crown is often free of branches. Leaves (needles) are small and narrow and occur in rows. On upper branches, needles tend to be thicker and more curved than those on lower branches. Needles are usually 1/2 to 1 1/2 inch long, pointed or notched at the tip, bluish-green when young turning dull green with age. Typically, they are flat, without stalks. As a Christmas tree, white fir has good foliage color, a pleasing natural shape and aroma, and good needle retention.