Sun. 8 to 10 inches tall, 12 to 14 inches wide. This fragrant non-culinary oregano features large purple-green bracts, rose flowers and clear, light green foliage with a dense, mounded habit. Kirigami is listed as a zone 5b perennial. We find it easy to overwinter ornamental oregano, with absolutely no care required, in a cold dark place. Regrowth begins quickly after plants are brought out into the light.