Nerium Oleander
Nerium oleander
📖 About this plant
Nerium oleander is one of the toughest, most adaptable flowering shrubs in the world — thriving in heat, drought, salt spray, poor soil, and urban pollution. Native to the Mediterranean and South Asia, it is extensively planted along Indian highways, in parks, and as a privacy hedge. The plant produces masses of showy, five-petalled (single) or many-petalled (double) flowers in shades of pink, white, red, salmon, and yellow throughout the warm season. The blooms are lightly fragrant, especially in the evening. Oleander is evergreen in frost-free climates and deciduous in colder regions. It is widely planted in Indian gardens because it requires almost no maintenance once established and provides non-stop colour for 8-9 months of the year. However, the extreme toxicity of the plant (all parts contain cardiac glycosides similar to digitalis) means it must be planted with care — never where children play unsupervised, never near livestock pastures, and always handled with gloves. Despite its toxicity, oleander remains one of the most popular ornamental shrubs in India, the Mediterranean, and the southern United States due to its indestructible nature and beautiful, continuous blooms.
🧑🌾 Care requirements
Full sun
Weekly (drought-tolerant)
Any (30-70%)
15-38°C
Wide tolerance — sandy, loamy, clay; pH 5.0-8.5. Tolerates poor and salty soils.
Light feeder — apply balanced fertilizer 2-3 times during growing season
🌐 Common Names
📋 Plant facts
- 🌍 Origin
- Mediterranean region to South Asia (found wild in India along riverbanks and streams)
- 📏 Max height
- 2-6 m (6-20 ft) as shrub or small tree
- 📐 Spread
- 1.5-3 m (5-10 ft)
- 🕰️ Bloom time
- Spring to autumn (March to November in India); year-round in warm climates
- 🎨 Bloom color
- Pink (most common), white, red, salmon, yellow, single or double
- 🍃 Foliage color
- Dark green, leathery, lance-shaped leaves 10-20 cm long
- ⏳ Lifespan
- 20-50 years
- 📈 Growth rate
- Fast — 30-60 cm per year
- ☠️ Toxicity
- EXTREMELY TOXIC — all parts (leaves, flowers, stems, sap, even water used for cut flowers) contain cardiac glycosides (oleandrin). Ingestion can be fatal to humans and animals. Even smoke from burning is toxic. Wear gloves when pruning. Do NOT plant where livestock graze.
- 🌱 Propagation
- Cuttings (most common — 15-20 cm semi-hardwood, root easily in water or sand), seeds (variable offspring)
🛡️ Health & Safety
EXTREMELY TOXIC — all parts (leaves, flowers, stems, sap, even water used for cut flowers) contain cardiac glycosides (oleandrin). Ingestion can be fatal to humans and animals. Even smoke from burning is toxic. Wear gloves when pruning. Do NOT plant where livestock graze.
Common issues
- Scale insects (especially oleander scale)
- aphids on new growth
- mealybugs
- leaf scorch in extreme heat
- sooty mold from aphid honeydew
- occasional bacterial gall on stems
- yellowing leaves from poor drainage
💡 Care tips
- Plant in full sun for maximum flowering — shade reduces bloom dramatically.
- Oleander is one of the few plants that thrives in poor, sandy, salty soils — perfect for coastal gardens.
- Once established, it is virtually maintenance-free.
- Prune in late winter to control size and shape — it tolerates hard pruning.
- Always wear gloves when handling oleander — the sap can irritate skin and all parts are highly toxic.
- Do not burn prunings — the smoke is toxic.
- Remove suckers from the base to maintain a tree form if desired.
- For hedges, space plants 1.5-2 m apart.
- The plant is salt-tolerant and ideal for roadside plantings.
- In cold regions (where it freezes to ground), it will resprout from the base in spring.
