Phytohormones are organic molecules produced naturally in higher plants and modulate growth or other physiological functions at locations remote from their production sites. Their concentrations are very small and they act at a distant site. A modification in the efficiency of production, product quality, or enhanced cosmetic appeal could increase the value of fruit trees significantly. Furthermore, they affect fruit set, retention, yield, and quality. When plant growth regulators are applied, a better yield is achieved because they improve the internal physiology of developing fruits, which improves fruit set and reduces fruit drop, while also correcting various physiological disorders that decrease quality and yield. Auxins, gibberellins, ethylene, cytokinins, growth regulators, and growth inhibitors are a few of the factors that influence plant growth. Phytohormones also control genetic expression. The use of growth regulators has become a standard part of agro-techniques for a majority of cultivated plants, in particular for fruit trees. So far in fruit crops, plant growth regulators have been widely used for vegetative propagation via cuttings, air layering, germination, in-vitro propagation, etc. Discover that NAA was useful in controlling the two most serious problems of apple production: first is biennial bearing and second is pre-harvest dropping. Discoveries of gibberellins and cytokinins led to increased commercial use of these hormone products for various purposes including improved fruit shape, increased consumer value through Blemish-Reduction, and optimized tree architecture, which can be achieved through overcoming apical dominance. Natural hormone abscisic acid shows the potential to overcome plant stress and increase early fruit harvest. In recent years, 1-MCP has revolutionized pome fruit storage by increasing post-harvest life and improving fruit storage quality.