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Stopping Sap Leak from Cut Walnut Roots: Don't Interfere

Question: Severed 1–1.5 inch walnut roots are leaking heavily into a ditch. Wrapping and sealant failed. Would burning help?

Answer

No—let it be. Spring sap pressure is high; the leak is normal and will stop as the tree naturally compartmentalizes the wound. Any sealing, burning, or wrapping damages living tissue and invites infection. The tree loses negligible moisture and will heal on its own.

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