About Agastache rugosa (Fisch. & C.A.Mey.) Kuntze
Agastache rugosa (Fisch. & C.A.Mey.) Kuntze is a perennial plant that grows 40 to 100 centimetres (16 to 39 inches) tall. It has square stalks that branch in their upper section. Its oppositely arranged leaves are oval-cordate, measuring 5 to 10 cm (2 to 4 in) long and 3 to 7 cm (1+1⁄4 to 2+3⁄4 in) broad, with coarsely serrated margins. Some leaves have hairs and/or patches of white on the underside, and the leaves are slightly larger than those of anise hyssop. In the Northern Hemisphere, purple bilabiate flowers bloom from July to September, growing in verticillasters that are 5 to 15 cm (2 to 6 in) long and 2 cm (3⁄4 in) broad. The calyx is 5 to 6 mm (0.20 to 0.24 in) long, with five narrow triangular lobes. Petals measure 8 to 10 mm (0.31 to 0.39 in) long; lower petals are longer, and inner petals are serrated. Flower color ranges from rose to violet. The stamens are didynamous, long, and exposed. The fruit is a schizocarp, containing obovate elliptical mericarps 1.8 mm (0.071 in) long. When cultivated, Agastache rugosa grows well in fertile, moisture-retentive soils and full sunlight. Its aroma becomes weaker when grown in shady conditions. This plant can be propagated by both sexual and asexual methods. Seeds collected in autumn can be sown in spring. For asexual propagation, dig up the plant in autumn or early spring, divide the roots, and plant the divided sections 30 cm (12 in) apart.
