This episode explains irrigation principles for trees for the ISA Arborist Certification Exam. Improper watering is one of the most common causes of tree stress, especially in urban landscapes.You’ll learn why trees are not lawns, how to apply water effectively, how soil type affects irrigation decisions, and why overwatering can be just as damaging as drought. This episode emphasizes biology-based irrigation practices tested on the exam.This episode is part of a larger ISA Arborist Certification study podcast series covering soils, water, and tree care fundamentals.

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