[Overview]
A perennial about 1 m tall.
The stems are erect.
The leaves are simple and alternate.
A long raceme at the stem tip has bracts on the inflorescence.
The flowers are two-lipped, with the upper lip 2-lobed and the lower lip 3-lobed.
The fruit is a capsule.
[Cultivation]
Propagate by division, bud cuttings, or from seed.
It prefers a sunny, well-ventilated, fertile and moist environment, and dislikes dryness.
Avoid the strong afternoon sun of midsummer.
Move potted plants to airy partial shade in midsummer.
For potted plants, when the soil surface dries, water thoroughly until water runs out of the bottom of the pot.
For plants in the ground, established plants tolerate dryness, but water if the soil is dry.
Apply slow-release fertilizer as a base fertilizer, and also place fertilizer on the soil in spring and autumn.
Pests and diseases include root rot, gray mold, aphids and armyworms.
