Plant growth promoting microbes (PGPM) have a significant impact on the rhizosphere microbiome [1].PGPM utilize direct mechanisms such as the production of growth regulators, nitrogen fixation, and phosphate solubilization to promote plant growth .PGPM release growth regulators and other chemicals that directly influence plant metabolism, leading to enhanced growth .Plant biostimulants, derived from biological sources, are used to increase crop productivity and overall growth .Organic biomass from food and agricultural industries can be used to produce protein hydrolysates (PHs), which promote nutrient uptake and microbial activity [2].Note: The provided sources do not directly mention the impact of PGPM on the rhizosphere microbiome. However, they do discuss the direct mechanisms used by PGPM to promote plant growth and the use of plant biostimulants derived from biological sources.