Part 1

ANSI A300 (Part 1) - 2008 Pruning

This part of the A300 standards applies to pruning and trimming operations.  Part 1 Pruning addresses:

  • Pruning practices
  • Pruning objectives (includes vista/view enhancement and structural enhancement)
  • Pruning methods (types)
  • Palm pruning
  • Utility pruning 

A300 Pruning standards recognize four basic pruning methods for pruning:

  • Clean: Selective pruning to remove one or more of the following parts: dead, diseased, and/or broken branches.
  • Thin: Selective pruning to reduce density of live branches
  • Raise: Selective pruning to provide vertical clearance.
  • Reduce: Selective pruning to decrease height and/or spread (consideration must be given to the ability of a species to tolerate reduction pruning). 

Advisory Notice:

Certain pruning practices are not acceptable and can injure trees:

  • Topping: The reduction of a tree's size using heading cuts that shorten limbs or branches back to a predetermined crown limit
  • Lion's Tailing:The removal of an excessive number of inner, lateral branches from parent branches
  • Rooster-Tailing: The over-thinning of palms.  

Part 1 Pruning Resources:

Learn more about pruning standards

In this video, SavATree's Dane Buel discusses proper pruning techniques, tools and how to pruning can improve the safety and value of the tree and the property it resides on.