Pruning a Crimson Maple: Timing and Techniques for Shape

A 12-15 year old crimson maple (15-20 feet) in Western Pennsylvania has one high branch needing pruning for better form.

Best Pruning Times

• Ideal: Late winter/early spring before leaf-out.
• Avoid: Mid-growing season (reduces effectiveness, may shorten tree life).
• Late summer: Risks frost-damaged new growth.
• Fall: When frost imminent, leaves falling.

Proper Cutting Technique

1. Cut branch ¼ inch from trunk, preserving the branch collar for natural healing.
2. Wounds <6 inches: leave unpainted.
3. Wounds >6 inches: apply wound dressing to prevent water entry.
4. For large limbs: three-cut method (undercut 1 foot out, top cut to remove weight, final cut at collar).

Reference: NC State pruning guide with diagrams.