Answer: Propagate from seed although summer cuttings are also practical. Soak seeds for one day: place in a pot 3-4" in diameter filled with a light propagation mix including perlite, and then transfer to pots of 6" when the plant develops, or directly 3 seedlings in a pot of 6". The best seedling is selected when the plant reached approximately 5-6". You may cover the plant to maintain a humidity sufficient in the pot.
Once you have the seeds out of the pod, you will notice the hard shell. Be aware that the seeds need to germinate this way: cover the seeds with very hot water and let soak overnight or until they swell. Pick out those that didn't swell and repeat this process with them. Sow swollen seeds immediately in seeding mix, covering with two to three times their thickness. Do not over water or allow to dry out and provide good drainage and bright light.
Seeds should germinate within 4-7 days with this pretreatment. Do not overwater the pots and keep humidity low or fungal problems may occur.
Mimosa trees prefer full sun and moderately fertile, well-drained soil. Water well during the growing period, and sparingly in winter.
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