Georgia Aster (Symphyotrichum georgianum)

Full sun to part shade
Low water needs
Bloom time: Fall
Size: 2-4 ft tall x 1 ft wide

2 inch purple/blue blooms. Prune occasionally before flowering to encourage denser plant. Important plant for bees. Spreads by underground rhizomes. Dies back in the winter.

http://hawthornhillwildflowers.blogspot.com/2010/10/georgia-aster-symphyotrichum-georgianum.html
https://florida.plantatlas.usf.edu/Plant.aspx?id=4175