Plant Growth Regulators (PGR) are chemical substances that are used to regulate the growth and development of plants. These products can be naturally occurring or synthetic, and they are used in agriculture, horticulture, and forestry to improve crop yields, overcome environmental stresses, and enhance the overall quality of crops. PGRs work by interacting with plant hormones or by mimicking their effects, and they can affect different aspects of plant growth, such as cell division, elongation, and differentiation. Proper use of PGRs can result in more vigorous growth, improved root development, increased fruit set, and delayed senescence. However, it is important to use these products according to label instructions and in a manner that is safe for both the plant and the environment.