in Tucson, Phoenix,
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Gardening in Tucson, Phoenix, Arizona and California

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Growing Nerium oleander: Oleander

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Form: A shrub or tree, depending on variety and pruning.
Leaf retention: Evergreen.
Growth rate: Moderate to rapid.
Mature Size: 3-20' high and 3-12' wide depending on variety.
Flowers: Red, pink, salmon, yellow, or white, in terminal clusters, with a single or double row of petals. Some varieties are fragrant. These flowers produce no nectar.
Bloom: Spring into fall.
Fruit: Brown seed pod with airborne seeds.
Leaves: Lance-shaped, 3-5" long, dark green on top, lighter underneath. Oleander provides medium shade.
Stems: No thorns. Gray.
Roots: Wide and deep.
Wildlife: A few insect larvae feed on this plant. It generally does not attract or support wildlife, is considered wildlife unfriendly, and therefore less desirable as a garden plant, especially because of its toxicity.
Toxic / Danger: All parts of this plant are toxic including its pollen. The smoke from burning leaves and stems is toxic. The sap may cause a skin rash. It should not be browsed by domesticated animals, or pets, and may cause their death.
Origin: Asia.

Cultivation and Uses
USDA hardiness zones: 8b-11.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun.
Water once established: Once or twice a month.
Soil: Oleander is tolerant of soil types in the pH range of 5.1-8.5 (highly acidic to alkaline). It performs best in alkaline soil.
Prune: In mid-winter, prune to shape. Do not shear.
Litter: Moderate. Blossom drop.
Propagation: Seed or cuttings.
Pests: Oleander Leaf Scorch disease, a bacterium spread by sharpshooter insects, and associated with irrigation, can be a problem in a few location.
Uses: Ornamental, screen, hedge.

Oleander is a member of the Dogbane family (Apocynaceae). It is a tough plant and will re-sprout from its roots if cut to the ground.

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Latest update: April, 2021.

Nerium oleander: Oleander - red flowers

Nerium oleander: Oleander - pink flowers

Nerium oleander: Oleander - white flowers

Nerium oleander: Oleander - shrub

Nerium oleander: Oleander - tree