Crucita, Fragrant Mistflower
Sun or part shade. Crucita is a sprawling perennial, with a woody base, soft stems and pale purple mistflowers. It is one of the very best plants for the native butterfly garden in autumn. Some of its common names provide a hint: Crucita’s airy seeds disperse over long distances, so it tends to travel and start its own gardens unless firmly contained. It’s native to South Texas, mostly below San Antonio — but in other parts of the world it is considered invasive.
Most gardeners cut it at least once per year to control its size and spread, as it doesn’t stay put on its own. In cold winters it may freeze all the way to the ground.