Quercus oblongata, commonly known as the Mexican Blue Oak, is a deciduous tree native to the oak woodlands and desert grasslands of the southwestern United States and northern Mexico. It typically grows to a height of 50-70 feet (15-21 meters) and a width of 15-30 feet (5-9 meters), with a rounded to irregular crown. The Mexican Blue Oak’s distinctive blue-green leaves and its ability to thrive in hot, dry climates make it a unique specimen. Its bark is light gray and can become deeply furrowed with age. The acorns are notable for their oblong shape and are a food source for wildlife.

The Mexican Blue Oak is valued for its drought tolerance and its ability to adapt to a variety of soil types, including those that are rocky or poor in nutrients. It is used in xeriscaping, as a shade tree in arid environments, and for habitat restoration projects. This oak requires minimal maintenance once established and is suitable for planting in full sun to part shade. It is important to provide well-drained soil to prevent root diseases. While generally disease-resistant, it can be susceptible to oak wilt, a serious fungal disease.CC BY-SA 4.0