Agastache rugosa Kuntze

Stems erect, 0.5-1.5 m tall, to 7-8 mm in diam., finely pubescent upward, branched, base glabrous. Leaves gradually reduced upward; petiole 1.5-3.5 cm; leaf blade cordate-ovate to oblong-lanceolate, 4.5-11 × 3-6.5 cm, adaxially subglabrous, abaxially puberulent, glandular, base cordate or rarely cuneate, margin serrate, apex caudate-acuminate. Spikes compact, cylindric, 2.5-12 × 1.8-2.5 cm; floral leaves lanceolate-linear, less than 5 × 1-2 mm basally, 2-3 mm apically; peduncles of cymes ca. 3 mm. Calyx ± purplish or purple-red, tubular-obconical, ca. 8 × 2 mm, glandular puberulent, yellow glandular, throat slightly oblique; teeth triangular-lanceolate, 3 posterior teeth ca. 2.2 mm, 2 anterior teeth slightly shorter. Corolla purplish blue, ca. 8 mm, puberulent outside; tube base ca. 1.2 mm wide, slightly exserted, gradually dilated to ca. 3 mm wide at throat; upper lip straight, apex emarginate; middle lobe of lower lip larger, ca. 2 × 3.5 mm, spreading, margin undulate; lateral lobes semicircular. Ovary apex tomentose. Nutlets brown, ovoid-oblong, ca. 1.8 × 1.1 mm, adaxially ribbed, apically hirtellous. Fl. Jun-Sep, fr. Sep-Nov.

It is a temperate to subtropical plant. It grows naturally in valleys all over Japan. It does best in sunny positions in well drained soil. It is frost hardy. It can tolerate temperatures down to-5°C or-10°C. It suits plant hardiness zones 7-11. In Melbourne Botanical garden. It grows in Sichuan.

The young leaves and flowers are eaten raw or cooked as a flavouring. They are used with meat. The leaves can be used for a herbal tea. The seeds are possibly edible.

Plants can be grown from seed. They should just be covered with soil and germinate in 1-3 months at 13°C. They should be grown in the nursery for the first year. Plants can also be grown by dividing clumps and can be grown from basal cuttings. These root in 3 weeks.