One of the most common questions posed when beginning an urban forest project is: how wide do tree roots grow? According to studies conducted by Colorado State University, most tree roots occupy an area two to four times the diameter of the crown. Other research done at Iowa State University suggests that roots may extend… More
In a recent post exploring the amount of soil it takes to grow a large tree, I challenged the notion that 1,000 cubic feet is a one-size-fits-all axiom. Ultimately, this rule of thumb allows only for the growth of a medium tree — and the more soil volume you include, the greater your chances of… More
Introduction The question of how much soil is required to grow a big tree is one that has been debated among arborists and landscape architects for decades — and the answer isn’t black and white. Space, pollutants, and engineering requirements are all major considerations that affect the growing conditions of urban trees. And, other than… More
A previous blog entry, Healthy Soils for Healthy Trees, discussed the importance of preserving soil structure from being destroyed by compaction. Together, soil texture and soil structure have the greatest influence on pore space in soil, and how easily air, water, and roots can move through a soil. Many people are aware of what soil… More
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