Part 1

ANSI A300 (Part 1) - 2008 (R2014) Pruning

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This part of the A300 standards applies to pruning and trimming operations.

Part 1 Pruning addresses:

  • Pruning practice
  • Pruning objectives (includes vista/view enhancement and structural enhancement
  • Pruning methods (type)
  • 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: