The present investigation was carried out to study the nutritional status of soil and tree species using sludge. The research was conducted at Punjab Agricultural University in collaboration with the State Forest and Wildlife Preservation Department at Forest Nursery Baddowal, Ludhiana. Sludge from different sewage treatment plants was used as an organic amend-ment. The main plot treatments included sludge from three sites (Bhattian, Balloke, Jamalpur) and a control (no sludge), and the sub-plots included three forest tree species: Terminalia arjuna (Arjun), Eucalyptus clone 413 (Safeda), and Melia composita (Dek). Different soil macro- (phosphorus, potassium) and micro-nutrients (zinc, iron, manganese), as well as organic carbon, electrical conductivity, pH, and dehydrogenase activity, were ana-lyzed in the soil after twelve months. The Arjun plants led to the highest improvement in soil macro- and micro-nutrient levels when grown with sludge from Bhattian, as compared to sludge from Balloke and Jamalpur. Plant macro- (nitrogen, phosphorus, potassium) and micro-nutrient (zinc, iron, manganese) contents were higher in sludge-treated soils (notably Bhattian) than in the control. Overall, sludge application significantly en-hanced soil fertility and the nutrient uptake of tree seedlings, with Arjun showing the greatest nutrient accumulation among the species.