What is the recommended diameter relationship for pruning informal, single-trunk shrubs?

What is the recommended diameter relationship for pruning informal, single-trunk shrubs?

• A. One third the diameter of the branch being removed
• B. One half the diameter
• C. Same diameter as the branch being removed
• D. Two thirds the diameter

Answer: (A)

When pruning informal, single-trunk shrubs, aim to cut back to a lateral branch that is about one-third the diameter of the branch being removed. This keeps the pruning wound small, promotes rapid callus formation, and helps the plant heal cleanly while preserving a natural, balanced shape. If the remaining lateral is much larger, the wound is too big and healing can be slower or more prone to decay; if it’s too small, the cut can look blunt and disrupt the plant’s natural form. Make the cut just outside the branch collar to encourage proper sealing.

When pruning informal, single-trunk shrubs, aim to cut back to a lateral branch that is about one-third the diameter of the branch being removed. This keeps the pruning wound small, promotes rapid callus formation, and helps the plant heal cleanly while preserving a natural, balanced shape. If the remaining lateral is much larger, the wound is too big and healing can be slower or more prone to decay; if it’s too small, the cut can look blunt and disrupt the plant’s natural form. Make the cut just outside the branch collar to encourage proper sealing.