Free Certified Arborist lessons
Complete lessons from the course: watch the video, read the key points and try the quick check before you buy.
▶ 2:38CODIT and wood's response to stress
How trees wall off decay after wounding, how wood grows in response to load, and how that shapes management by developmental stage.
Watch the free lesson →
▶ 2:37Types of pruning cut and how to sequence them
Branch removal, reduction, heading and shearing cuts, when each is appropriate, and how to sequence cuts to avoid tearing bark.
Watch the free lesson →
▶ 2:14Defects and conditions that raise the likelihood of failure
The tree defects and conditions that make failure more likely, how to recognize them from the ground, and how to judge their significance.
Watch the free lesson →