Oleander. Evergreen Shrub. One of the basic shrubs for desert and hot interior valleys. Moderate to fast growth; most varieties reach a maximum height of 8 – 12 ft. and as wide. Ordinary broad and bulky, but easily trained into a handsome into a handsome single or many stemmed tree resembling and olive tree. Narrow leaves, dark green, leathery and glossy. 4 – 12 in. long, attractive all seasons; a form with golden variations in leaf is sometimes available.