Source: http://tnhorticulture.tn.gov.in/horti/agro-climatic-zones
| Zone | Districts | Soil type |
| North Eastern Zone | Kancheepuram, Tiruvallur, Cuddalore, Vellore, Villupuram and Tirunvannamalai | Red Sandy Loam, Clay Loam, Saline Coastal Alluvium |
| North Western Zone | Dharmapuri, Krishnagiri, salem and Namakkal (Part) | Non Calcareous Red, Non Calcareous Brown, Calcareous Black |
| Western Zone | Erode, Coimbatore, Tiruppur, Theni, Karur (part), Namakkal (part), Dindigul, Perambalur and Ariyalur (part) | Red Loamy, Black |
| Cauvery delta | Thanjavur, Nagapattinam, Tiruvarur, Trichy and parts of - Karur, Ariyalur, Pudukkottai and Cuddalore | Red Loamy , Alluvium |
| Southern Zone | Madurai, Sivagangai, Ramanathapuram, Virudhunagar, Tirunelveli and Thoothukudi | Coastal Alluvium, Black, Red Sandy Soil, Deep Red Soil |
| High rainfall | Kanyakumari | Saline Coastal Alluvium, Deep Red Loam |
| Hilly | The Nilgiris and Kodaikanal (Dindigul) | Lateritic |
