Abstract: The present study was conducted to investigate the effects of different concentrations and combinations of plant growth regulators (PGRs) on callus induction of Tecomella undulata (Sm) Seem. The leaf segments were used as explants and cultured on Murashige and Skoog (MS) medium supplemented with different concentrations of auxins such as NAA, 2,4-D, IAA and cytokikinins like BAP and KIN alone and in combinations for callus induction.