Q.Weeping Black Walnut
The wind broke a large limb of a black walnut tree. The tree is now oozing sap from that area and is dripping excessively down the trunk. Is there anything I can put on the wound? And is there anything I can do to clean the sap off the trunk?
Heather
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on May 1, 2011
You may want to cut the wounded area to be flat rather than jagged, if possible. This will help keep disease out of it. You really can't stop the sap, and to be honest, it is the best things for the tree as it will keep the wound clean. Do not use anything to seal the wound as this can trap disease in the wound.
This article has some ideas on how to clean the sap off the trunk:
https://www.gardeningknowhow.com/ornamental/trees/tgen/how-to-remove-tree-sap.htm
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