From Tropical South and Central America. These plants have striking foliage and trumpet-shaped flowers (borne nearly year-round). Plant permanently outdoors only in the mildest climates. Elsewhere, grow as summer-blooming potted plants; keep indoors during cold weather. They tolerate very little frost and need heat for proper growth and bloom; warm nights and warm days are necessary. Remove spent flowers for increased bloom.
allamanda, golden trumpet
allamanda blanchetii(Allamanda violacea)
- Shrubby or with a few vining stems; usually grows 610 feet tall and wide.
- Leaves are somewhat downy and up to 5 inches long.
- Rose-purple flowers are 3 inches across.
- Cherries Jubilee has brilliant burgundy-red blooms.
- Can grow to great heights (over 50 feet.) as a vine; it can clamber through trees but must be tied to other supports.
- Often pinched back to grow as a large, freestanding shrub.
- Leaves are glossy, leathery, 46 inches long.
- Yellow trumpets are 5 inches wide, 3 inches long.
- Chocolate Swirl have pinkish-purple flowers with purple-brown throats.
- Flore Pleno bears double flowers.
- Hendersonii bears exceptionally attractive orange-yellow blooms.
- Shrubby growth to 46 feet high and wide; produces occasional climbing stems.
- Flowers are 3 inches wide, bright yellow, sometimes with throats tinted orange or reddish.