Answer: In my experience mimosa trees are usually propagated by seed. I am unable to find directions specific to mimosa trees for this reason. If you want to try by cuttings, you could try both softwood and hardwood cuttings and see. Here are directions on how to do this.
Otherwise, I would suggest you collect seed and plant it now. Set the seedpods on prepared soil in the garden or where you would like to have a tree, and look for seedlings next June or so. You can also transplant tiny seedlings, take a large shovel of soil with a seedling just an inch or two tall to avoid disturbing the roots. If you have access to the property next summer you should be able to find many seedlings popping up naturally -- but be sure to move them while they are tiny.
Or, you can provide a cool stratification period for the seeds by placing them in a closed jar or container with some barely damp vermiculite; store this in your refrigerator for eight weeks and then start the seeds.
Good luck with your project!
Q&A Library Searching Tips