This research deals with the effects of exogenous growth regulators on dry weight, contents of aminoacids and phenolic compounds in leaves of cotton plants. To study the influence of the chemicals, cotton seeds were immersed during 22 hours in water solutions of (2-chloroethyl) trimethylammonium chloride (CCC) at concentration of 2000 ppm, succinic acid-2,2-dimethylhydrazide 4000 ppm,gibberellic acid 100 ppm, indolylacetic acid (IAA) 100 ppm, and water as check treatment. CCC 2000 ppm increased the dry weight in the leaves of cotton plants. This growth retardant increased the content of free aminoacids in cotton leaves. IAA 100 ppm reduced the concentration of aminoacids in the treated plants. The contents of phenolic compounds in leaves of cotton was increased by CCC, in relation to check treatment.