Giant Thevetia
Scientific Name: Thevetia thevetioides (Kunth) K. Schum.
Synonym: Cerbera thevetioides
Family: Apocynaceae
Sunset®: 12-13,22-24
USDA: 9b-11
Frost Tolerance: Semi-hardy in Phoenix, occasionally loses some leaves after a cold night
Heat Tolerance: Not as tolerant of low-desert heat as Thevetia peruviana
Sun Exposure: Full sun
Origin: Central and southern Mexico
Growth Habits: Small tree 10 to 25 feet tall (3-8 m); milky sap; wavy linear-lanceolate leaves, 2.4 to 5 inches long (6-12.5 cm), 0.2 to 0.5 cm wide (5-12 mm)
Watering Needs: When established, regular deep watering
Propagation: Seeds, cuttings
The scientific name is Thevetia, of André Thévet (1502-1590), French missionary who collected plants in South America.
The sap and the seed of the Yellow Oleander are poisonous. The seeds contain potent heart stimulants, that can be lethal if enough is ingested.
Blooming Habits:
Bright yellow flowers, 4 inches in diameter (10 cm), in summer.
Fruiting Habits:
Large green spherical fruits with rounded corners turning black when ripe and creating visible litter as they fall.
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