They are all over the place, indestructible, and perfect for the laissez-faire gardener. The Mexican Petunia is a welcome immigrant, will not be stopped and frisked for no reason, and need not self-deport. It comes in two flavors, purple and pink, and in varied sizes. (Actually, it comes in more colors and sizes, but good luck.) It hugs any and all things in your garden, but is not unmanageable.