Alpha Naphthyl Acetic Acid (NAA) is a synthetic plant growth regulator and hormone analog that plays a significant role in horticulture and agriculture. It is chemically classified as a naphthalene derivative and is closely related to the natural plant hormone indole-3-acetic acid (IAA). NAA is renowned for its ability to stimulate and regulate various aspects of plant growth, making it a valuable tool for growers and agriculturists.

NAA is commonly used to promote rooting in plant cuttings, encouraging the development of new roots in a wide variety of plant species. This property makes it a vital component in the propagation of plants through vegetative means, such as cloning. Furthermore, NAA is employed to prevent fruit drop in fruit-bearing trees and to enhance fruit set, resulting in increased crop yields. Its effectiveness in controlling fruit thinning and enhancing the size and quality of fruits has made it an indispensable resource in modern agriculture. NAA’s role in influencing plant growth and development has cemented its place as a valuable asset for growers looking to maximize their crop production and improve the overall health of their plants.