Q. Can a mimosa tree survive in upstate New York?
Mimosa (Albizia julibrissin) is usually grown in the south or the West Coast of the US but it is actually hardy to USDA Zone 6. If Wurtsboro is your home then you may be able to grow this species as Wurtsboro is in Zone 6a. Prolonged temperatures close to 0°F will damage the tree but any dead branches can be pruned back in the spring. Growing the tree in a sheltered spot will help.
Mimosas are extremely susceptible to fusarium wilt disease but luckily this is less of a problem in drier, colder regions. There is a cultivar of mimosa known as cold hardy mimosa (Albizia julibrissin 'E. H. Wilson' ) which is hardy to Zone 5 so you may want to consider this variety. A. julibrissin f. rosea is smaller (15 - 25 ft.) and cold hardy to zone 5b.
For additional information about mimosa, please see our recent post.
Courtesy of NYBG Plant Information