Height: 15′-30′ Spread: 12′-20′. Native Rocky Mountain oak with a shrubby growth habit that may grow to a small to medium-sized tree. Glossy green leaves turn a golden yellow to an occasional orange or red in fall. Tolerates both dry conditions and alkaline soils. Hardy to 8000′ where it grows in beautiful groves that may cover entire mountainsides. Full sun. Zone 3.