The mimosa tree (Albizia julibrissin), is a fast-growing, deciduous tree that features fern-like leaves and soft pink flowers. Often called the silk tree for the silky strands of the flowers, the tree can grow up to 40 feet tall, but it usually short-lived The mimosa tree is susceptible to a wide variety of diseases, including fungal diseases and wormwood infestations. The tree's seed pods, which average 7 inches in length, are considered a nuisance, as well as the flowers, which are very sticky. Still, many home gardeners enjoy the beauty and fast-growth of the tree.