Plant Growth Regulator
A growth Regulator , Plant Growth Regulator or PGR, is a natural Synthetic chemical that is sprayed or otherwise applied to a seed or plant in order to alter its characteristics. PGR are sometimes referred to as plant hormones. Growers can add PGR to their crops in order to achieve a desirable goal, ranging from increasing insect and disease resistance to increasing root strength. Some PGR's also are used to stunt growth.