This year, 2025, marks 30 years since “ANSI A300 Part 1, Pruning” was published. Where would the industry be without this guidance? Photo 1: Topping of trees was common practice in utility, municipal and residential settings. Photo courtesy of [...]

Arboriculture is a field filled with diverse techniques and philosophies – especially when it comes to pruning. From aspect ratios to species-specific recovery times, you can find varying opinions among arborists worldwide. However, emerging research and field experience consistently point [...]

In Part 1 of this article (TCI Magazine, October 2025), we introduced four foundational elements useful in diagnosing problems with trees and shrubs, represented by the acronym SPSD, and discussed the first “S,” which stands for “site,” and the “P,” [...]

Unlike corn or soybeans, trees are long-lived woody structures, high in carbon and endlessly complex. Unlike crops, they must continue growing and defending year after year, producing enough energy to get through the sleepy dormant season (or, for evergreens, protect [...]

These two books were written by Linda Chalker-Scott, former urban horticulture extension specialist and a professor in the Department of Horticulture at Washington State University. They say you can’t judge a book by its cover – or its title, for [...]