This study looked at the morphological characteristics and physiological behaviour of tomato (Lycopersicon esculentum Mill.) seedling to five different concentrations of 3.00g, 5.00g, 7.00g, 8.00g and 10.00g per 2kg of soil and control in a randomized complete blocks design made up of ten replicates. Seeds were sown in a plastic pot and left for ten days to germinate before they were transplanted to polythene bags. Varying concentrations of NPK fertilizer (3.00g, 5.00g, 7.00g, 8.00g, and 10.00g per 2kg of soil) were applied. Number of leaflets, leaflets with lesions, and number of dead leaves were counted for twenty days after NPK fertilizer application. The findings revealed that higher concentration (8.00g and 10.00g) had unusual growth while 5.00g and 7.00g concentrations had more leaflets than the control. Moreover, increase in NPK fertilizer concentration resulted in the rise of leaves with lesions and dead leaflets. 10.00g had the highest number of leaves with lesions and increase in leaflets death. This result revealed that 5.00g and 7.00g per 2kg of soil is ideal for proper plant growth. Meanwhile, undue concentration leads to tissue destruction and physiological strain. An ideal NPK fertilizer application and carrying out soil test to ascertain nutritional composition is recommended.

• Dead Leaves