|Abies concolor is a slow to medium growing fir with blue-green leaves pointing upward and forward along the shoot. The 3- to 5-inch cones are greenish-purple when young, turning brown. Reaches heights up to 130 feet. 'Fastigiate' is columnar in shape. It has flat, blunt needles and short, tiered, upward growing branches. This plant enjoys plenty of sun, cooler climates and acidic soil.