16" tall, space 18" apart, Zones 4-9, full to part sun, 4" pot.
A mass of purple-blue flower spikes from late spring through mid-summer. Perfect as a tall ground cover; a backdrop for your other plants; or an impressive blue color statement. 'Kit Kat' is uniform, compact and low-spreading. Small, gray leaves are aromatic to protect from deer browsing. Attracts butterflies.