Of Mimosa tree (they are also called, "silk trees"), Steve Nix writes, "This fast-growing, deciduous tree has a low branching, open, spreading habit and delicate, lacy, almost fern-like foliage. Fragrant, silky, pink puffy pompom blooms, two inches in diameter, appear from late April to early July creating a spectacular sight." There's certainly enough positive there to catch one's attention! But as About's Forestry Guide relates in this article on silk trees, you'll have to weigh Mimosa trees' drawbacks against their positives before planting them.