Culture
In climates where temperatures do not dip below 60°F, this tropical climber may be grown outdoors as a short lived perennial in evenly moist, fertile, well-drained soils in full sun. It appreciates some light afternoon shade in hot climates. It needs a support on which to climb. Where temperatures dip below 60°F, this plant may be grown in a greenhouse. It is frequently grown as an annual or biennial. It is easily grown from seed.
Noteworthy Characteristics
Clitoria ternatea, commonly called butterfly pea, is an evergreen climber that typically grows on slender stems to 10' (less frequently to 15') tall. It will trail through a shrub to 6'. The native range of this species is not fully agreed upon, but has escaped cultivation and can be found in tropical regions around the world today. This climber features compound odd-pinnate leaves (to 5" long), each with 5-9 elliptic to ovate rich green leaflets. Pea-like, clear blue flowers (2" diameter) with yellowish centers bloom singly or in pairs from summer to fall. Fruits are flattened pods.
Genus name comes from the Latin word clitoris meaning clitoris for a characteristic of the flower.
The specific epithet is in reference to the island of Ternate in Indonesia which was considered by Linnaeus as the native territory of this species.
Problems
Watch for spider mites. Whiteflies may appear. Susceptible to anthracnose and bacterial soft rot.
Uses
Grown on a support such as a trellis. Weave through a hedge. The flowers can be used to impart a blue coloration to foods and beverages.