This study explores the phenological events of selected tree species in Yamuna Nagar district of Haryana, during the calendar year 2024. Systematic observations of the plants were conducted from January to December. The research focused on key phenophases including leaf flush, flowering, fruiting, and senescence of leaves across commonly occurring tree species such as Albizia lebbeck (L.) Benth., Azadirachta indica A.Juss., Cordia myxa L., Dalbergia sissoo Roxb. ex DC., Delonix regia (Bojer ex Hook.) Raf., Ficus religiosa L., Jacaranda mimosifolia D.Don., Melia azedarach L., Pterospermum acerifolium (L.) Willd., Terminalia bellirica (Gaertn.) Roxb, Toona ciliata M. Roem., and Syzygium cumini (L.) Skeels. The plants exhibited distinct phenological behaviors influenced by local environmental conditions. The major phenological events, like leaf flush, flowering, and fruiting took place in the months of March to May. The senescence of leaves started in autumn and continued in winters. The study revealed species-specific variations in the timing and duration of phenophases, with notable sensitivity to seasonal fluctuations. Also the study shall provide valuable baseline information for long-term ecological monitoring, biodiversity conservation, and adaptive forest management practices with expected climate change in the near future

Phenophases, Climate change, Forest management, Yamuna Nagar

The impacts of global warming are now being felt and some studies have observed a change in the phenology of plants and higher temperature is the major contributor (Mrekaj et al., 2024). In a warmer world, the seasons of spring, summer and autumn may change and alter the phenological processes in plants. Therefore, such studies are important to understand the phenological shift due to climate change

Varsha Nigam, Amarjit Singh and Gian Bhushan (2025). Exploring the Phenological Patterns of Selected Tree Species in District Yamuna Nagar, Haryana. Biological Forum, 17(5): 58-62