Perovskia atriplicifolia
Airy spikes of lavender-blue flowers top strong stems with small, finely dissected, silvery-green leaves. Its loose, open habit makes this perennial an effective filler in the back of the border. A perfect perennial for hot, dry climates and also exceptionally cold hardy. Perovskia can be used in a wide variety of environments with little attention through the season - a reason they have long been a staple of landscapers. Expect these plants to be a little later to emerge in spring, but also to offer color well into fall.