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.
Place or plant your mimosa tree in a location where it will be exposed to full sun. Full sun is defined as a minimum of six hours of sunlight per day.
Choose rich, well-drained soil for your silk tree. Any potting soil is fine if your tree is in a container. If your tree is in the ground, ensure that it is receiving nutrients by adding two or three inches of organic mulch around the tree and to the edges of the tree's canopy. Doing this once in the spring should be enough to provide nutrients and also inhibit spring weed growth.
Water young silk trees enough so that the soil is moist. Established trees can be watered less often. Mimosa trees can withstand periods of drought. Still, water the tree during extended hot, dry periods.
Prune away any dead or dying branches early each spring. The mimosa tree is often affected by fungal diseases. Pruning away affected branches can prevent the spread of the disease. Pruning also maintains the shape of this fast-growing tree, which can become unruly.
Monitor the ground for new seedlings. The tree spreads easily and you probably don't want a small forest of them in your garden. Remove them as soon as you see them. Also, rake up seed pods immediately after they drop.