Abstract <p>Changes in climate have an impact on plants’ morphological, physiological, biological, and biochemical conditions. Biochemical changes, protein regulation, molecular processes, post-translational modification, and signal transduction are all examples of how plants react to abiotic stress. The roles, synthesis, and effects of phytohormones are fascinating. It’s interesting to note that in recent decades, there has been a lot of interest in using phytohormones to lessen the effects of abiotic stress. By promoting seed germination, seedling growth, leaf photosynthesis, root growth, and antioxidant enzymes while decreasing the buildup of reactive oxygen species, malonaldehyde, and electrolyte leakage, phytohormones might enhance resistance to abiotic stressors. Plant growth and development are regulated by phytohormones, which can be essential to a plant’s ability to adapt and survive under various stressors. Plant growth-promoting bacteria (PGPB) also produce several of these phytohormones, including cytokinin, gibberellin, salicylic acid, auxin, and ethylene. Numerous microorganisms create and release hormones that aid plants in absorbing nutrients including N, P, and Fe. Utilising these bacteria exogenously aids plants in resolving nutritional deficiencies caused by abiotic stressors. In addition to discussing many effective mitigation techniques that may be used to enhance plant growth during stress exposure, this review sheds light on the function of phytohormones in plant response mechanisms to flooding stress. Therefore, the goal of this review is to provide an overview of the evolving ideas about the role of phytohormones in abiotic stress reduction, primarily in horticultural crops, as well as a description of recent research that has determined the function of various phytohormones in stressful conditions. Because phytohormones increase horticultural crops’ resistance to abiotic stress, such a review will aid in clearing the way for the rise of sustainable agriculture. Lastly, we go over a few points regarding the connection between the synthesis of phytohormones and other processes of plant growth promotion (PGP). Given the function of hormones and the ability of microbes to produce hormones, we suggest using both hormones and microbes as a possible crop stress control technique.</p>