BUTTONBUSH (Cephalanthus occidentalis)NATIVE PLANT buttonbush requires full sun to partial shade in moist to wet soils. This shrub thrives in low-lying areas . In North and Central Florida it blooms in both spring and summer. Parts of this plant, particularly the leaves, are toxic.
Zones 5 through 10
Go here for additional information: https://gardeningsolutions.ifas.ufl.edu/plants/trees-and-shrubs/shrubs/buttonbush.html#:~:text=Characteristics,across%206%20to%208%20feet