John Eisenhower of Integrity Tree Service talks about the Tree Of The Month, the Yellow Oleander!
Scientific Name: Thevetia peruviana
Form: large shrub or small multiple-trunk tree
Size: 20 feet tall, but can be maintained at 6 to 12 feet
Leaves: Bright green, smooth leaves, 6 inches long
Flowers: Cluster of yellow apricot to orange color tubular flowers
Fruit: Multicarpulate greenish fruit
Stems/Trunks: 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.
Range/Origin: Tropical America
Hardiness: Sunset 12 (w/ protection), 13, 21-24
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.
Source: Virtual Library of Phoenix Landscape Plants - Arizona State University