Physiologically Himachal Pradesh can be divided into Five Zones.
Wet Sub temperate Zone :- Dalhousie, dharamshala, Palampur, Baijnath, Jogindernagar. Humid Sub-temperate zone:- Kullu, Shimla, some parts of Mandi, Solan, Chamba, Kangra & Sirmaur. Dry temperate Zone:- Alpine high parts of lahul Spiti, Pangi, kinnaur. Humid sub tropical zone :- Mandi, Nahan, Nalagarh, Nurpur etc. Sub-Humid tropical zone:- Paonta Sahib, Indore area of kangra.