Application of sodium-dikegulac reduced plant height with associated increase in branch and leaf number and root biomass in C. roseus (L.) G. DON. Chlorophyll content reduced significantly after first month of 100 and 250 $mu extrm{g}$/ml DK application. However, such reduction was replaced by significant rise after forth month in 250$mu extrm{g}$/ml DK application and fifth month in 100$mu extrm{g}$/ml DK maintained higher level till harvest. Total sugar content was significantly high during forth and fifth month stage of growth after DK application. Amino acid content was higher during third to fifth month in 100$mu extrm{g}$/ml DK treatment and during third to forth month in 250$mu extrm{g}$/ml DK treatment. Tryptophan, on the other hand showed higher content at the fifth month stage of growth after application of DK in both the concentrations. Leaf and root dry weight as well as total alkaloid content were highest in 100$mu extrm{g}$/ml DK application. DK, therefore, appears to be a potential chemical for increasing biomass and alkaloid content in C. roseus.