Not actually a petunia! I really like this as a groundcover, just wish it would spread faster!
Though to be fair, I think I planted it only a year ago, and as the saying goes: first year sleeps, second year creeps, third year leaps! So I’ll give it ’til next year to see if it takes off, I guess. 
According to Prairie Moon Nursery, it can spread aggressively once it’s established: https://www.prairiemoon.com/ruellia-humilis-wild-petunia…
(As a side note, in the last few years, someone at Prairie Moon has really upped their game in the direction of making their website much more informative, attractive, dare I say even seductive, as they teach people about native plants. Great job, whomever worked on that!)
