his woody multi-stemmed sub-shrub is a low-maintenance plant. Silvery-green delicate foliage is complemented by striking lavender-blue flowers. Produces 12-inch spiky blooms from July through frost; when in full bloom, creates a misty-blue haze. Has an airy habit. Flowerheads and silvery stems have added winter interest. Plant size reaches four to five feet tall by three to four feet wide.