Description

Shrubby Climber: Allamanda blanchetii is a perennial that can grow as a sprawling shrub or a climber, often reaching 2-3 meters in height and width.
Twining Stems: It has weak, sprawling stems that are covered in bristle-like hairs.
Fast Growing: The plant spreads rapidly, especially by layering, and is known for its vigorous growth.
Leaves:
Arrangement: Leaves are arranged in whorls of usually four. 
Shape and Texture: They are elliptic, slightly hairy, and can range from green to yellow-green. 
Size: Leaves are typically 10-20 cm wide. 
Flowers:
Shape and Color: The flowers are trumpet-shaped, large, and showy, with a pinkish-purple to violet hue. 
Size: The blooms are about 7-10 cm across. 
Blooming Season: In consistently warm climates, they bloom almost year-round. 
Buds: Flowers open from burgundy-brown buds. 
Other Characteristics: 
Milky Latex: Stems and leaves contain a milky latex that can be irritating.
Foliage: The leaves are evergreen.
Fruit: The fruit is a spiny seed capsule.
Sunlight: It thrives in full sun.
Soil: Well-drained, fertile, and slightly acidic soil is preferred.
Toxicity: All parts of the plant are poisonous if ingested.
Cultivation:
Ornamental Use: It's commonly used as an ornamental plant, often on trellises or pergolas, or as a specimen plant. 
Tropical and Subtropical Regions: It's well-suited for warm climates and can be grown outdoors in containers during the summer in temperate regions. 
Pruning: Purple Allamanda can be pruned into a shrubby form.