Plant Growth Regulators (PGR)


Plant Growth Regulators (PGRs) are a group of compounds that greatly affect the growth and behavior of plants, much like hormones greatly affect the growth and behavior of animals. There are currently five recognized groups of plant hormones: auxins, gibberellins, cytokinins, abscisic acid (ABA) and ethylene. The EPA defines PGRs as a kind of pesticide, despite not having any pesticidal activity.

« Back to Glossary Index