Castor — 4Water, nutrients & weeds

• Fertilizer (rainfed)

  Apply NPK basally as per soil test where possible. If soil test recommendations are not available, the blanket recommendation for rainfed castor is 45:15:15 kg NPK per hectare.

  Pending expert review

  Source

  Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Castor – Application of fertilizers, pp. 207–208

  Region

  Tamil Nadu

  Last updated

  2026-11-04

• Weed management

  Apply pendimethalin or fluchloralin at 1 litre per hectare as pre-emergence on the 3rd day after sowing, followed by hand weeding twice, on the 20th and 40th day.

  Follow the instructions on the product label. Consult your local Agriculture Officer before use.

  Pending expert review

  Source

  Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Castor – Weed management, p. 209

  Region

  Tamil Nadu

  Last updated

  2026-11-04