Japanese name: サンシキアサガオ（三色朝顔） Scientific name:Convolvulus tricolor
[Overview]
An annual 20–40 cm in both height and spread, though in subtropical to tropical regions it may become a short-lived perennial.
It is hairy all over.
The leaves are simple and alternate, elliptic to lanceolate.
The flowers are borne singly in the leaf axils, on long stalks.
The corolla is funnel-shaped, 4–6 cm across, deep blue at the edge, white in the middle and yellow at the base.
The flowers open when the sun shines on them; each flower lasts only one day, but they bloom one after another.
The fruit is a capsule.
[History]
It was introduced as an ornamental in the first years of the Meiji era.
[Cultivation]
Propagate from seed.
It prefers a sunny, well-drained, well-ventilated place.
It has a taproot and dislikes being transplanted.
For potted plants, water after the soil has dried; for plants in the ground, rainfall is sufficient.
Apply liquid fertilizer during the growing period.
There are no particular pests or diseases.
