SelecTree: Tree Detail
Photo Locations: Alameda Plazas, Alice Keck Park Memorial Garden - Santa Barbara, CA, San Luis Obispo, CA and San Diego, CA
Utility friendly tree.
Oleander is a commonly grown shrub, also used as either a single or multi-trunk trunk tree standard. Its shiny evergreen foliage and showy flowers in the summer make it quite attractive. It is very durable, and tolerates heat, dryness as well as poor or salty soils. The milky white sap is poisonous, however. It is easily maintained below 25' in height. It is susceptible to oleander knot.
This plant is classified as invasive by the California Invasive Plant Council (Cal-IPC) lists this plant, notes it is not known to be invasive and also notes it has reports from riparian area
Has fragrant Flower.
Native to Mediterranean.
Has Evergreen foliage.
Height: 10 - 20 feet.
Width: 10 - 15 feet.
Growth Rate: 24 to 36 Inches per Year.
Longevity 50 to 150 years.
Leaves Lanceolate, Dark Green, No Change, Evergreen.
Flowers Showy. Fragrant Pink, Red, Rose, White or Yellow. Flowers in Spring, Summer or Fall. Has perfect flowers (male and female parts in each flower).
Brown or Mostly Green Follicle, Medium (0.50 - 1.50 inches), fruiting in Summer or Fall Wildlife use it.
Bark Dark Brown or Light Green, Furrowed or Smooth.
Shading Capacity Rated as Dense in Leaf.
Litter Issue is Dry Fruit.
Tree Site Conditions & Constraints
Sunset Zones 8 - 16 and 18 - 24.
USDA Hardiness Zones 9 - 11.
Exposure Full Sun to Partial Shade.
Moist to Dry Soil.
Clay, Loam or Sand Texture.
Slightly Acidic to Highly Alkaline Soil pH.
Salinity Tolerance is Good to Moderate Inland.
Seaside Tolerance is Good in South Coast.
Pests & Disease Information
Resistant to Texas Root Rot and Verticillium. Susceptible to Aphids and Scales, Armillaria and Sooty Mold.
Health, Safety & Environmental Concerns
Branch Strength Rated as Medium.
Root Damage Potential Rated as Low.
Irritant and Poisonous Health Hazard.
Biogenic Emissions considered Low.
Fire Resistance is Favorable.
Desirable Wildlife Plant.
Not Deer Palatable.
Wildlife use Fruit.
Special Uses & Values
Cite this tree:
SelecTree. "Nerium oleander Tree Record." 1995-2020. Sep 29, 2020.
< https://selectree.calpoly.edu/tree-detail/nerium-oleander >
SelecTree Nursery Connection Map
Cal Poly / ESRI