Answer: The mimosa tree, otherwise known as the Silk Tree (Albizia julibrissin), is a rapidly growing tree that can reach 40 feet tall with a 50-foot spread. That said, any mimosa tree can be pruned to keep it smaller (10-20 feet). The beauty of the mimosa tree is the pink plume-like flowers it bears in the summer, and the feathery foliage that folds up at night. A mimosa tree looks best when pruned back and allowed to develop multiple trunks. They can be messy, though, and that's where their reputation as a nuisance comes into play. If you plant your mimosa tree next to a patio or deck, you'll have to remove the litter of fallen leaves, flowers, and seed pods frequently. If the tree is planted in a lawn area, cleaning up is as easy as running the lawnmower beneath it.
The seeds in the pod of a mimosa can be planted and they will grow into new little trees. Allow the pods to ripen on the trees. When they begin to twist and split, you can harvest the seeds and plant them either in the ground or in plastic pots. Plant the seeds only half an inch deep and they will sprout in a few weeks. Best wishes with your new mimosa trees!
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