A study was conducted to assess the effect of nano-nitrogen, supplemented with potassium on the growth and yield attributes of rice, at College of Agriculture, Vellayani, Thiruvananthapuram, Kerala, India during the summer season (January to April 2022) with a short duration rice variety KAU Manu Rathna. The experiment was laid out in Randomized block design with nine treatments replicated thrice. The treatments were T1 : 100% basal recommended dose of nitrogen (RDN) + topdressing (TD) with nano-nitrogen at active tillering (AT) + K2SO4 at panicle initiation (PI); T2: 100% basal RDN + TD with nano-nitrogen at AT + PI; T3 : 75% basal RDN + TD with nano-nitrogen at AT + K2SO4 at PI; T4 : 75% basal RDN + TD with nano-nitrogen at AT + PI; T5 : 50% basal RDN + TD with nano-nitrogen at AT + K2SO4 at PI; T6 : 50% basal RDN + TD with nano-nitrogen at AT + PI; T7 : 25% basal RDN + TD with nano-nitrogen at AT + K2SO4 at PI; T8 : 25% basal RDN + TD with nano-nitrogen at AT + PI and T9 : KAU package of practices. Nano-nitrogen was applied as nano-urea. Plant height was found superior in T4 at AT, T3 at PI and T2 at flowering stages. The treatments T2, T6 and T5 were found superior in number of tillers m-2 at AT, PI and flowering stages respectively. Leaf area per hill and leaf area index were highest in T1 at AT and T6 at PI and flowering stages. At AT to PI stage, T2 recorded the highest leaf area duration, while from PI to flowering stage T6 resulted in the highest Leaf area duration (LAD). The treatment T2 recorded the highest flag leaf area per hill, while total dry matter production was superior in the treatment T5. Productive tillers per m-2, grain yield per hectare and straw yield per hectare were found to be superior in the treatment T5.