TREE SIZE
In this catalog, we list both the expected height and width of each tree. Height describes how tall the tree will grow, from the ground up to the highest branches. Width describes how far the branches spread outward at maturity, measured at the widest part of the canopy.
In urban environments, trees often grow much smaller than their potential due to limiting factors like restricted root space, compacted soil, inconsistent water supply, pollution, heat stress, and pruning for infrastructure. Because of these challenges, we rely on real-world data rather than idealized nursery tags to determine tree sizes. Using Oregon’s TreePlotter inventory system, we analyze average sizes based on actual urban trees rather than theoretical maximums. For instance, while Douglas-fir ( Pseudotsuga menziesii ) can exceed 300 feet in optimal conditions, urban specimens in Oregon average just 65 feet. While some trees may surpass these averages, most are constrained by city conditions. By providing data-driven size estimates, we offer a realistic understanding of how trees will grow in urban spaces, helping you make informed decisions for your city, neighborhood, or backyard.
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