I have a Mimosa approximately 10' tall, which has 2 branches and the fork has a small crack in the middle. I have already lost one tree to the winter and I want to protect this one. Should I try to seal the cut, and if so, what with?
Damaged Mimosa Tree
Certified GKH Gardening Expert
No, sealing the crack can trap disease against the wound and will make it worse. Instead, try treating the wound with a fungicide, which will help keep pests away. If the crack is bad enough that you worry the tree may fully split, you can use bolts to hold the two side together and provide additional support to the crotch of the branches.