Best Time to Prune Silver Maple: Fall Timing

Bleeding vs. Healing

Silver maples are "bleeders"—pruning in late winter/early spring causes copious sap flow (cosmetically alarming, not harmful). But August heat is worst—high sap pressure, stress, slow healing.

Optimal Window

Mid-September onward—growth slows, sap pressure drops, but leaves are still on (energy for healing). Safe through February.

Why Not November?

Late fall (after leaf drop) is fine, but September–October gives the tree active photosynthetic capacity to compartmentalize wounds before dormancy.

Recommendation

Schedule for mid-September. Large limb (over roof) and dead stub (2-ft diameter) both removed with collar cuts. No paint. Tree enters winter with sealed wounds.