I like to use the perennial Purple loosestrife or Lythrum salicaria in planting plans. What I find interesting is that this plant is considered invasive in some parts of the country. Fortunately, I have not seen that to be the case in my part of the country. This plant has a long bloom period, takes the Texas heat and the winter cold. It made the list of Texas A&M University Horticulture’s “Perennial Plants to use in Texas”.
In this photo, the purple loosestrife is the taller plant in the back with the purple / magenta flowers. In front is artemisia and pink flower carpet rose.