What is a plant regulator?

A plant regulator, also known as a plant growth regulator (PGR), is a substance that influences the growth and development of plants by altering physiological processes. These compounds can promote or inhibit growth, control flowering, and enhance fruit development, among other effects. PGRs are commonly used in agriculture and horticulture to improve crop yields, manage plant size, and optimize flowering times. They can be synthetic or naturally occurring substances.