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Mimosa Tree Pruning: Timing and Limits for Large Specimen

Pruning a 20-Foot Albizia julibrissin: One-Third Rule

Best pruning times: early fall, late winter, or early spring. Avoid 2 weeks before first frost (fresh cuts vulnerable).

Amount

Never remove >⅓ of canopy. For a 20-foot tree, 6 feet reduction is appropriate.

Flowering Consideration

Mimosa blooms on new wood. Pruning in late winter/early spring doesn't reduce flowering—may enhance it by stimulating vigorous growth.

Structural Pruning

  • Remove crossing/rubbing branches
  • Eliminate weak crotches
  • Maintain central leader if tree form desired
  • Clean cuts at branch collar

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