The silk tree, also known as the mimosa tree, is a deciduous tree that is fast growing and reaches a height up to 35-feet with an umbrella shaped canopy. The tree has feather like leaves that are 1-foot in length and produces small pink flowers that form 6-inch powder puff clusters. The flower clusters turn into long, flat seed pods that are used for propagation. Each pod contains numerous seeds that must be stratified prior to planting.
Collect or purchase silk tree seeds for germination.
Complete a scarification process on the seeds by breaking through the outer seed coat with a file.
Purchase a sterile seed starting soil or make your own by mixing together equal portions of course sand, peat moss and perlite. Lightly moisten the soil with water so it is damp but not wet.
Fill a seed starting tray with moist seed starting soil at a depth of 2-inches. Sow the seeds at a depth that is twice the diameter of the seed. Lightly cover the seeds with soil.
Cover the tray with a clear plastic cover or enclose in a plastic bag. This will increase the humidity level for seed germination. Place the covered tray in a warm indoor location that has indirect sunlight.
Monitor the seed starting tray to prevent the soil from drying out. Lightly mist the soil when necessary. Open the plastic covering once a day to refresh the air around the seeds.
Remove the plastic covering once the seedlings have grown to the same level as the cover.