Mushroom cultivation is a sustainable way to make use of agricultural waste and satisfy the rising demand for nutritious nourishment. The goal of this study was to evaluate the effects of different supplements (agricultural organic wastes) on yield and growth of elm mushrooms (Hypsizygus ulmarius). A Completely Randomized Design (CRD) with three replications per treatment was followed as statistic design to evaluate the treatments which comprised of different agriculture organic waste i.e.,wheat straw, mustard oilcake, chickpea bran and wheat bran. There were a total of 10 treatments of various combination of wheat straw withmustard oilcake, chickpea bran and wheat bran at different concentration. The quickest times for spawn run (19.67 days), primordia formation (29.33 days) and harvest (36.57 days) were observed when 10% chickpea bran was added to wheat straw. It also showed the maximum biological efficiency (116.2 %) and total fresh weight (535g). The addition of mustard oilcake, on the other hand, decreased production and caused contamination. The results highlight how important supplement type and concentration are for increasing biological efficiency and mushroom yield. Chickpea bran emerged as a promising alternative to conventional supplements like wheat bran, offering both economic and sustainable advantages.