The Bur Oak (Quercus macrocarpa) is one of the most imposing oaks, characterized by a trunk diameter that can reach up to 10 feet. It typically thrives in open spaces, away from the dense canopy of forests. In Canada, it can attain a height of 12 to 18 meters and a diameter of 60 to 80 centimetres. With an estimated lifespan of 200 to 300 years, the Bur Oak exhibits distinctive growth patterns. Its trunk and upper branches ascend towards the sky, while its middle branches develop horizontally. The Bur Oak’s natural habitats encompass forests, riverbanks, fertile bottomlands, and sandy plains.
In contrast, red oak (Quercus rubra) thrives in well-drained soil, while bur oak (Quercus macrocarpa) flourishes in clay or clay loam soils. Oaks provide habitat for over 500 species of butterflies and moths, which, in turn, support numerous bird species, particularly during the breeding season. Their broad crowns and ability to reach heights of up to 80 feet make them visually appealing. However, it is important to note that oak wilt poses a potential future concern.
Caring for Bur Oak
The bur oak requires patience because it has a slow growth rate of less than 25 cms (12 Inches) per year. This tree thrives in rich, well-drained, alkaline loam soils. It boasts a deep and extensive root system with a prominent taproot. While transplanting may be challenging, it demonstrates high pollution tolerance and adaptability to urban environments. Additionally, it is drought tolerant, which is great!
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