An experiment was carried out in the field and laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh to find out the effect of CI-IAA, TNZ-303 and GABA on vegetative growth in lentil (Lens esculenta Moench.) var. BM-3 and BM-4. Plant growth regulators were applied on seeds by soaking in aqueous solution of different concentration for 12 hours prior to sowing. Vegetative growth of variety BM-3 was better than that of BM-4. Results revealed that all the plant growth regulators selectively enhanced vegetative growth of both the varieties. Among the PGRs, the GABA performed the best on vegetative growth over other two plant growth regulators as well as over the control. The plant height, number of branches, number of leaves and number of nodules per plant significantly enhanced by GABA and the best result was at 0.664 ml L-1. Among the other growth regulators TNZ-303 at 0.166 ml L-1 and CI-IAA at 0.332 ml L-1 was also good for better morphological growth of lentil. All plant growth regulators regulated morphological growth of both the varieties.