Allamanda cathartica ‘Indonesia Sunset’ is a cultivar of the Allamanda, which is native to tropical South America in particular Brazil. It is part of the Apocynaceae family of plants. Allamanda cathartica ‘Indonesia Sunset’ is sometimes called Allamanda ‘Indonesia Sunset’, Golden Trumpet, Common Trumpet Vine, or Allamanda cathartica ‘Jamaican Sunset). It is a tropical, evergreen perennial climber with orange or peach colored trumpet flowers. Allamanda is named after Frédéric-Louis Allamand (1736-1809) a Swiss botanist, it was published by Karl Friedrich Philipp von Martius (1794-1868) a German botanist and explorer in Flora Brasiliensis. Together with John Baptist von Spix he traveled to Brazil supported by the King of Bavaria, Maximillian I Joseph.
Allamanda cathartica ‘Indonesia Sunset’ can grow to about 6m or 20ft. The foliage is leathery, elliptic and bright green. The flowers are trumpet-shaped and peach-colored with has fives petals, it has five lobed sepals. The flowers are about 10cm o 4in. After flowering it produces seed pods.
Plant Allamanda cathartica ‘Indonesia Sunset’ in in the sun or partial shade in humus-rich and well-drained soil, though it does not like to be water-logged it requires moisture and humidity. Prune it to shape. Allamanda cathartica ‘Indonesia Sunset’ is poisonous and when cut it produces latex that can irritate the skin. It is generally disease-free but watch out for mealybugs.