Jatropha (Physic Nut)
Jatropha curcas
📖 About this plant
Jatropha curcas, commonly called Physic Nut, Barbados Nut, or simply Jatropha, is a drought-resistant shrub or small tree native to Central America that has become naturalized across India and tropical regions worldwide. The plant has gained global attention in the 21st century as a biofuel crop — the seeds contain 30-40% oil that can be processed into biodiesel, and the plant grows on marginal, degraded land where food crops cannot grow, avoiding the food-vs-fuel conflict. India has been a major promoter of Jatropha biofuel cultivation, particularly for use in rural electrification and as a blend with diesel. Beyond biofuel, Jatropha has multiple traditional uses — the plant is widely planted as a live hedge (it forms an impenetrable, drought-resistant barrier), the leaves are used as a green manure (rich in nitrogen), the bark yields a dark blue dye, the latex is used to treat wounds and skin diseases, and the seed oil is used in soap and candle making. In Ayurveda, Jatropha has been used (with great caution due to toxicity) to treat skin diseases, rheumatism, and as a purgative. However, the plant is highly toxic — the seeds contain curcin (a toxalbumin similar to ricin) and purgative oils that can cause severe diarrhea, dehydration, and death. Despite its toxicity, Jatropha is widely grown as an ornamental, hedge plant, and biofuel crop in India. The plant is extraordinarily tough — it thrives on wastelands, poor soils, drought, and extreme heat, making it valuable for reclaiming degraded land.
🧑🌾 Care requirements
Full sun
When dry (drought-tolerant)
Low to moderate (30-60%)
15-40°C
Well-draining sandy or rocky soil; tolerates poor and saline soils. pH 5.5-7.5
Light feeder — compost or balanced fertilizer once or twice per year
🌐 Common Names
📋 Plant facts
- 🌍 Origin
- Central America and Mexico (widely naturalized in tropical Asia and Africa)
- 📏 Max height
- 3-6 m as a shrub or small tree
- 📐 Spread
- 2-4 m
- 🕰️ Bloom time
- Year-round in tropics; peak after rainfall
- 🎨 Bloom color
- Small yellow-green flowers in clusters; female flowers larger than male
- 🍃 Foliage color
- Dark green, large lobed (3-5 lobes) palmate leaves 10-20 cm across; deciduous in dry season
- ⏳ Lifespan
- 30-50 years
- 📈 Growth rate
- Fast — 60-100 cm per year
- ☠️ Toxicity
- Highly toxic — seeds contain curcin (a toxalbumin) and purgative oils; keep away from children, pets, and livestock. A few seeds can be fatal.
- 🌱 Propagation
- Seeds (germinate in 1-2 weeks), stem cuttings (root easily)
🛡️ Health & Safety
Highly toxic — seeds contain curcin (a toxalbumin) and purgative oils; keep away from children, pets, and livestock. A few seeds can be fatal.
Common issues
- Highly pest-resistant due to toxic latex
- occasionally aphids on new growth
- leaf spot diseases in humid weather
- root rot from overwatering (most common killer)
- leaf miner
💡 Care tips
- Plant in full sun with 2-3 m spacing — Jatropha is a large shrub or small tree.
- The plant thrives on neglect and is perfect for difficult sites — poor soil, dry slopes, degraded land, and wastelands.
- Water only during extended dry spells once established.
- Apply compost or balanced fertilizer once or twice per year.
- Prune in late winter to control size and shape — the plant tolerates hard pruning and is often maintained as a hedge.
- Wear gloves when handling — the latex can irritate skin.
- The plant is highly toxic if ingested — keep away from children, pets, and livestock.
- The seeds are particularly toxic — a few seeds can be fatal.
- Plant Jatropha as a live hedge (space plants 60-90 cm apart), as a biofuel crop, or for reclaiming degraded land.
- The plant is suitable for arid and semi-arid regions and is drought-tolerant.
- For biofuel production, harvest seeds when fruits turn yellow and split open.
- The plant is fast-growing (60-100 cm per year) and starts producing seeds in 1-2 years.