Agronomic Characteristics and Climatic Suitability
Castor is a deep-rooted, drought-hardy crop well adapted to semi-arid tropical and subtropical climates.
India is the world's leading producer and exporter of castor oil, with improved hybrid varieties yielding heavy spike architectures.
It thrives on well-drained sandy loam to medium black soils, avoiding waterlogged lowlands.
- Deep taproot: Penetrates deeply to extract moisture and nutrients from subsoil layers
- Non-edible industrial oil: Used globally in lubricants, paints, cosmetics, pharmaceuticals, and engineering biopolymers
- Hybrid vigor: Modern pistillate hybrids (such as GCH series) yield multiple productive spikes per plant
Sowing Practices, Spacing, and Seed Treatment
Castor is predominantly sown during the Kharif season between July and August, or under irrigated conditions through September.
Maintaining wide row spacing is critical because hybrid castor plants develop extensive lateral vegetative canopies.
- Seed rate: Approximately two to two-and-a-half kilograms of hybrid seed per acre
- Spacing: Maintain ninety to one hundred twenty centimeters between rows and sixty to ninety centimeters between plants
- Seed treatment: Treat seeds with Thiram or Carbendazim to prevent seed-borne seedling rot and wilt
Harvesting, Safe Handling, and Live Mandi Rates
Harvesting is carried out in sequential pickings as individual primary, secondary, and tertiary spikes turn golden-brown.
Castor seeds contain toxic ricin; farm workers must handle harvested seeds with care and never allow livestock to consume castor foliage or seed cake.
Farmers can track live daily wholesale castor seed prices on the KisanPe Mandi Rates portal.
- Sequential picking: Harvest mature dry spikes when capsules turn brown before capsule shattering occurs
- Toxicity warning: Seeds contain ricin; strictly prevent ingestion by farm livestock, poultry, or children
- Mandi rates: Check daily live modal prices across regional agricultural mandis on the KisanPe Mandi Rates dashboard
Official source
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Indian Institute of Oilseeds Research (ICAR-IIOR) ↗Related on KisanPe
Common questions
Which Indian states produce the majority of castor seeds?
Gujarat is the largest producer, accounting for over seventy percent of India's castor output, followed by Rajasthan and Telangana.
Why is castor oil in high global industrial demand?
Castor oil is unique in containing ricinoleic acid, which gives it high viscosity, temperature stability, and value in lubricants and polymers.
Are castor seeds and plants safe for farm animals to eat?
No, castor seeds and foliage contain toxic ricin and ricinine; they must never be fed to cattle, sheep, or poultry.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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