Very robust.  Forms large patches.  Given its potential to be very tall, it may needs to have support from adjacent plants.   Data on salt tolerance comes mostly from northern sources where the source of salt is winter road de-icing. Background plant as tall.

Wild petunia's flower only last for a day, but they have a very long flowering period, starting in early spring and going strong through the fall. Please use this Florida native instead of its widely-sold relative, the invasive Mexican petunia. Groundcover along with other low-growing wildflowers.