Fly ash has great potential in agriculture due to its efficacy in soil health modification and crop performance. Legumes have symbiotic Nitrogen-fixation with rhizobia. Main purpose of this work was to use the pollutant as soil fertilizer. The study was on the effect of FA on physico-chemical properties of soil, some morpho-physiological, and biochemical properties of legume plant. Results confirmed useful effects at low and harmful at higher concentrations of FA. One can further state as an ample scope for the secure utilization of FA in agriculture sustainability.