Best Practices for Pruning

Proper pruning is essential to a tree’s long-term health and stability. Every cut has the potential to permanently influence a tree’s growth, making it critical to prune with care and purpose. A young tree that is properly pruned to maintain its health and structure will not require major annual pruning as it matures.

In addition to supporting healthy development, properly pruned trees—especially when thoughtfully placed around your home—can offer protection during windstorms. In contrast, improperly pruned trees are more likely to fail during significant weather events, posing risks to people and property.

Hat-Racking Definition

To safeguard your trees and your home, avoid harmful practices such as hat-racking, excessive shaping, over-lifting, or over-thinning. Correct pruning techniques help trees defend themselves against pests, diseases, and decay, ensuring a strong and resilient canopy for years to come.

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Proper Pruning 

To prune correctly, it's essential to understand the branch bark ridge—the raised area at the branch junction—and the branch collar, the swollen section just below that connection. Make all cuts at a slight angle, just beyond the branch bark ridge and outside the branch collar. This method ensures the cut area has a natural protective zone that callouses over to prevent decay.

Objectives of Pruning

The main objectives of pruning are to remove dead, damaged, diseased, or crossing branches and to promote a strong, central trunk with balanced branching. Pruning also helps provide safe clearance for vehicles and pedestrians, and reduces the weight of heavy limbs, especially those with bark inclusions. Canopy thinning improves light penetration, air circulation, and overall tree structure.

Improper Pruning

Pruning should always be done with care to minimize hazards, promote strong canopy structure, and avoid improper cuts that can weaken the tree and lead to code violations. The following are some examples of improper pruning practices. 

  • Topping or Hatracking – heading cuts that shorten limbs or branches back to a predetermined point in the canopy
  • Flush Cut – cutting into the branch bark ridge and inside the branch collar 
  • Stub Cut – an cut made between two nodes where branches do not meet
  • Over-thinning – the removal of an excessive number of inner, lateral branches from parent branches 
  • Lions-tailing – the removal of an excessive amount of branches in the interior portion of the canopy, leaving the majority of leaves out toward the ends of the branches, resulting in an uneven distribution of foliage 
  • Over-lifting – the removal of an excessive number of branches in the lower portion of the tree