Expect the tree to quickly reach between 20 and 25 feet in height and 10 to 20 feet in width. This is what is necessary to start the seeds. The growth rate of the tree is fast, frequently earning the Mimosa Tree as much as 5 feet in a growing season! Mimosa Tree Pests and Diseases. Here’s our beginner’s guide covering how to grow Mimosa hostilis (syn. Mimosa is still planted as an ornamental because of its fragrant and showy flowers but has escaped into the forest and now considered an invasive exotic. Seed Pods; Peat pots (when transplanted these will disintegrate into the soil) Water Mimosa wilt, also known as fusarium wilt, is the biggest problem. Silk tree mimosa growing is really quite easy. Mimosa's ability to grow and reproduce along roadways and disturbed areas and to establish after escaping from cultivation is a major problem. Roots like to spread out as well, so it is wise not to plant this tree close to a sidewalk or other cement patio where it could cause disruption. It is also exceptionally fast-growing. Albizia silk trees need a little space to accommodate their arching habit, so be sure to plan for this accordingly when planting. Mimosa is considered an exotic invasive tree. The wilt, which will fast kill a mimosa tree, is caused by a soil-borne fungus and infiltrates water-conducting tissues, blocking the flow of … Mimosa trees grow quickly, attaining heights of 30 to 40 feet in five or 10 years. To grow a Mimosa Tree from seed, it is necessary to purchase seeds from a seed company, or if there is a nearby Mimosa Tree, ask the neighbor if he or she would allow you to pick up some of the fallen seed pods. The Mimosa Tree is a small to medium sized ornamental tree. Although somewhat fragile, they’re cold hardy only in USDA zones 6 through 10. Mimosa tenuiflora) from seed.An important perennial tree or shrub species native to Brazil, Colombia, El Salvador, Honduras, Mexico, Panama and Venezuela, this useful plant is most often called by the informal names ‘Carbonal’, ‘Jurema’ and ‘Tepezcohuite’. But mimosas are fairly easy to grow and virtually care-free once established. Mimosa trees are hardy enough to stave off most diseases. Pests, Diseases, and Other Concerns