Mimosa, 3rd Year, Has 4 Trunks Emerging From The Ground

Question

There is no central leader. Is this acceptable for the future of the tree or is there something we need to do?

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Answer 1

Mimosas are short lived trees and often grow multi-trunks. It's important, then, to prune all the branches when young to raise the canopy and develop good scaffolding. The branches are often brittle. You can do light pruning at any time to remove dead wood, but heavier pruning should be done late winter.

https://extension.uga.edu/publications/detail.html?number=B961&title=Pruning%20Ornamental%20Plants%20in%20the%20Landscape