The work analyzes phonological parameters: start of season (SOS), end of season (EOS), peak of season (POS), and length of season (LOS) using the Advanced Very High-Resolution Radiometer (AVHRR) Global Inventory Modeling and Mapping Studies (GIMMS) Normalized Difference Vegetation Index Version 3g (NDVI-3g) data from 1982 to 2015. The inflexion point method was used in determining the phenological metrics. Results show that the Humid zone (H) has the highest mean NDVI, indicating healthier vegetation cover, while the Warm Arid zone (WA) has the lowest mean NDVI, suggesting less vegetation. Seasonal variations in NDVI values are observed, with highest values during the wet season and lower values during the dry season. The Cold Sub-Humid zone (CSH)