[Overview]
A shrub or perennial, sometimes an annual.
The leaves are alternate and usually simple and ovate with a heart-shaped base, though some are palmately divided into 3–7 lobes.
The leaf margins are toothed.
The flowers are 5-petaled and borne singly in the leaf axils or in inflorescences.
Many stamens form a staminal tube.
The fruit is a schizocarp.
[Cultivation]
Propagate by cuttings.
In warm regions from the Kanto region southward it can overwinter outdoors.
It prefers sunny, well-drained soil.
For potted plants, from spring to autumn water thoroughly when the soil surface dries, and keep on the dry side in winter.
For plants in the ground, rainfall is sufficient.
From spring to autumn, apply slow-release fertilizer placed on the soil.
Aphids can occur.
