Field experiments were conducted to study the effect of seed pelleting with flyash on growth, gas exchange parameters and seed yield in greengram with different concentrations ranging from 25 to 300g kg-1 of seed. Observations on growth and yield parameters viz., plant height, number of branches, number of leaves, leaf area, dry matter production, number of pods, number of seeds per pod, 100 seed weight, seed yield per plant and gas exchange parameters viz., net photosynthetic rate, transpiration rate, stomatal conductance and intercellular CO2 concentration were recorded. Based on the results, it was observed that greengram seeds treated with flyash @ 250g kg-1 recorded increased seed yield with increase in growth and yield parameters.