Answer: The trees may have experienced some stress over the winter and early sprng months but since they're well established they may recover. I'd leave the trees alone until next spring. You may see some leaves appear later in the season. If not, check to see if the stems and branches are alive by scraping away the bark; green tissue means it's alive and there's still hope; brown tissue just beneath the bark means that stem or branch is dead. You can prune away the dead wood in hopes of new growth. If you don't see anything encouraging by next spring, it's time to remove and replace your mimosa trees.
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