I love Mimosa! We played with the blooms and seed pods as kids.. They have a lovely scent. It is called a 'trash tree' and we have them everywhere on our farm. My honeybees as well as hummingbirds, bumblebees and other pollinators visit every day..
One day when my son was 2 (he's thirty now), I was hanging clothes and he was sitting under a big Mimosa --waiting for our 'picnic'... He said "momma, hurry'--I went flying thinking there might be a snake--He said "look'... The Mimosa was FULL of hummingbirds...hundreds of them! We lay on the blanket and watched for hours..It was much louder than my beehives..
Just rake the seedpods and/or mow if any comes pop up! Enjoy and watch for hummers in the spring and summer!