Scientific: Thevetia peruviana
Common: yellow oleander
Family: Apocynaceae
Origin: Tropical America

Pronounciation: The-ve-TEE-a per-u-vee-A-na

Hardiness zones
Sunset
12 (w/ protection), 13, 21-24
USDA 9-11

Landscape Use: Mostly found as a large background screening shrub, foundation plant for large buildings, or as a small multiple-trunk tree. Extended flowering creates an accent effect over an entire growing season.

Form & Character: This is an intermediate, awkward-sized woody perennial plant that can be trained as either a large shrub or small tree. It's upright and spreading to rounded, clean and shiny with a tropical appearance.

Growth Habit: Evergreen, woody, moderately vigorous to 20 feet tall, but can be maintained at 6 to 12 feet in height.

Foliage/texture: Bright green, glabrous, linear to lanceolate leaves to 6 inches long, nearly sessile; medium fine texture.

Flowers & fruits: Terminal cluster of yellow apricot to orange tubular flowers followed by a multicarpulate greenish fruit.

Seasonal color: Yellow or orange flowers during warm season.

Temperature: Hardy to 25oF.

Light: Full sun, but the trunk of yellow oleander will easily sunscald if the plant's canopy base is elevated and the trunk is exposed to direct sunlight. Avoid western exposures!!

Soil: Tolerant

Watering: Yellow oleander, being a shrub that originates form the tropical New World, will require regular and frequent waterings in the Phoenix area to stay vigorous and resistant to heat stress injury, especially during 'The Long Hot Summer'.

Pruning: Light pruning is sometimes warranted to improve shape. Sometimes this large shrub is trained into a small multiple trunks tree.

Propagation: Seed and cutting.

Disease and pests: None

Additional comments: This was once a prototypical 'mesic plant' for green landscapes in Phoenix and was popular in Phoenix before 1990. Today however, it is far, far less popular because of the greater societal emphasis on desert landscaping and low water use plants. A white flowering cultivar is rarely available in nurseries. Like Nerium oleander, all plant parts of Thevetia peruviana are poisonous.