Answer: Unfortunately it is unlikely that your little tree will survive in zone 5A -- the coldest part of zone 5 -- although not impossible. These trees are usually considered unreliably hardy in zone 6. But, winter hardiness tends to be somewhat inherited in individual trees so the fact that the parent survived in zone 6 is a good sign. If it is planted in a sheltered microclimate with protection from winter wind and well drained soil, it might make it. I would suggest using a heavy mulch over the roots, wait to apply it until the ground has frozen. You may find that it dies back to the ground each winter but that the roots survive. If so, it can still regrow and bloom each summer as it blooms on new growth of the season. Be very patient in the spring, sometimes it can take until almost early summer for the tree to send up top growth after a hard winter. (I saw this when I grew one in zone 6.) Good luck with your mimosa tree!
Q&A Library Searching Tips