CONCOLOR FIR, Abies concolor – Native to the Southwest, this tree exhibits blue-green needles up to 3 inches in length. Becoming popular as a unique Christmas tree with its striking foliage, good needle retention, and zesty, tangerine fragrance. Prefers well-drained, fertile soils. A slow grower, but perfect for someone looking for one-of-a-kind Christmas tree. Seedling height: 6-14 inches. Mature height: 70-90 feet. Maximum of 500 seedlings per customer.