Stiff, lance-shaped evergreen leaves and dense clusters of five-petaled blooms make Oleander a ubiquitous sight along dry highway corridors and coastal gardens. Native to Mediterranean stream beds, it thrives in lean, drought-prone soils by storing reserves and minimizing water loss through leathery leaves. Every part of the plant harbors potent cardiac toxins that deter virtually all browsing mammals.
All parts contain lethal cardiac glycosides and sap causes dermatitis; do not touch without gloves or ingest.
Why it is dangerous
Contains lethal cardiac glycosides such as oleandrin that cause severe heart arrhythmias, vomiting, and cardiac failure if ingested, while milky sap causes contact skin irritation.
How to recognize a risky encounter
Recognizable by tall woody stems, leathery lance-shaped leaves arranged in whorls of three, and clusters of pink, red, or white five-petaled flowers.
What to do
Avoid skin contact with milky sap, wear thick protective gloves while pruning, and keep children and pets away.
Responsible observation
Pruning Safety: Wear heavy gloves and eye protection when trimming branches to avoid contact with toxic sap.
Disposal Caution: Never burn branches or leaves, as inhaling smoke can cause severe respiratory poisoning.
Pet Precaution: Keep pets away from fallen leaves and twigs, which remain highly toxic even when dry.
