The increasing environmental problems are created by large-scale production of fly ash (FA), attention is now been paid to the recycling of FA as a good source of nutrients. An important component of recycling effort is using FA to improve low fertility soils. The study explored the possibility of increasing phosphorus availability in FA through vermicomposting. Present investigation showed that pH of the treated and controlled series was decreased with increase in FA concentrations and the biomass production of the earthworm was increased in the progression of 0% __ampersandsigngt; 5% __ampersandsigngt; 10% __ampersandsigngt; 25% __ampersandsigngt; 50%. The different combinations of FA and cattle dung (CD) showed that phosphorus availability in FA due to vermicompost was significantly increased in the 5%, 10% followed by 25% and 50% combinations. The concentration of nutrients was found to increase in the earthworm treated series of cattle dung and FA combinations. The increase in available phosphorus may be attributed to direct action of worm gut enzymes and indirectly by stimulation of micro flora.