Albizia julibrissin, commonly called mimosa or silk tree, is a fast-growing, small to medium sized, deciduous tree that typically grows in a vase shape to 20-40’ tall with a spreading, often umbrella-like crown. It is native to Asia. It is noted for its bipinnate compound dark green leaves (to 20” long). Each leaf has 10-25 pinnae, with each pinnae having 40-60 tiny leaflets (to 1/4” long). Leaves have a fern-like appearance. Fluffy, pink, powder puff flowerheads cover the tree with a long summer bloom. Flowers are fragrant and attractive to bees. Flowers give way to flat bean-like seed pods (to 7” long) which persist into winter. Sensitive leaflets close up when touched and at night. Albizia julibrissin is a popular ornamental because of its fragrant, showy flowers and because it attracts hummingbirds.
- Scarify the seeds by nicking or sanding the seed coat.
- Soak the seed in water for several hours.
- Prepare a mixture of half potting soil and half sand, perlite or vermiculite.
- Put the mixture in a pot with drainage holes in the base.
- Water the mixture so that it is moist but not wet.
- Put the seeds on the soil.
- Cover the seeds with a thin layer of soil.
- Water the seeds and keep the soil moist but not wet.
- Place the pots in an area with warm temperatures in full sun or part shade.
- When the seedlings are a few inches tall, they can be transplanted.