The mimosa tree is cold weather tolerant and has been known to survive temperatures as cold as -25 degrees Fahrenheit. Nature Hills Nursery in Omaha Nebraska claims the mimosa tree “acts as a natural de-wormer for woodland creatures.” From my own experience, in addition to being pretty and smelling wonderful, the mimosa trees that have been in my yard provided lots of great shade from the sun.
Unfortunately, the mimosa tree is considered by many horticulturalists, and others, to be an ecological threat. Mimosa trees can grow in a variety of soils, produce large seed crops that travel and spread easily by wind and water, and re-sprout when damaged. It is a strong competitor to native trees and shrubs in open areas or forest edges. Dense stands of mimosa severely reduce the sunlight and nutrients available for other plants. -Birdy