To test the effect of Greenzit nutrient solution on different forest tree species at seeding stage, a study was conducted in Pakistan Forest Institute, Peshawar during 1980. Data indicate that the Greenzit nutrient solution significantly increases the height growth of Eucalyptus camaldulensis, Juniperus excelsa and Pinus reoxburghii seedlings. However, there seems to be no positive response of the nutrient on diameter of species under study.