Forests in Sirsa District are known as `Northern Tropical Thorn Forest` and some of the trees existent in this Indian district include Kair (Capparis deciduas), Jand (Prosopis cineraria), Pipal (Ficus religiora), Jaal (Salvadora oleoides), Reru (Acacia lucophloea), Neem (Azadirachta indica), Beri (Zizyphus mauritiana) and Lasura (Cordia dichotoma) amongst numerous others.
A vast amount of forest lands which previously thrived in Sirsa District are presently non-existent and the main areas of vegetation are located near railway lines, in the form of strips. The Forest Department of Sirsa District has ensured that various species of trees are planted here, for instance Prosopis juliflora (Vilayati Kikar), Acacia tortilis (Israeli Kikar) and many others. Several Shisham and Eucalyptus trees have been planted near the side of canals, since the soil in those regions possess a high water level. Kikar tree grows near the roads where the soil contains lower moisture levels and higher pressure. Acacia tortilis is found alongside the border of the state of Rajasthan, as it can withstand soils which has an extremely low quantity of moisture and experiences low rainfall which is lower than 30 cm per year.
Since the water table is gradually increasing in certain portions of the district like Surtia, Nathusari Chopta, Phaggu and Rori, it renders the soil infertile and incapable of supporting the cultivation of agricultural crops. This is due to the fact that the rising water table makes the soil completely saline. Eucalyptus, which is also known as `Biodrain` thrives in such regions since it easily is capable of tolerating saline soils. Sirsa district boasts of the highest number of Shisham trees in Haryana. Numerous Shisham trees had been planted in this area during the 60`s and 70`s, which have grown into tall, beautiful trees.
India Forest Act, 1927 have proclaimed these forests as protected forests. The forest of PACCA is the one and only reserve forest located in Sirsa. According to the National Forest Policy, about 20% of the area under plains had been aimed to be covered by vegetation. Efforts are being made in order to expand the natural vegetation of Sirsa District.
The older trees of this region are constantly dying due to the excessive utilization of nitrogen fertilizers and other human activities.
