Shoot tip cultures of ‘Redhaven’ peach [Prunus persica L. (Batsch)] and its compact mutant ‘Com-Pact Redhaven’ reacted differentially to exogenous BA in vitro. ‘Com-Pact Redhaven’ produced the highest number of axillary shoots at 30 µm BA, while the maximum proliferation of ‘Redhaven’ occurred at 10 µm BA, with a significant decrease in proliferation at 30 µm BA. At 100 µm BA, axillary shoot proliferation was more than twice as high in ‘Com-Pact Redhaven’ as in ‘Redhaven’ cultures. Maximum increase in total fresh weight of explants occurred at 10 µm BA for both culti-vars, but, at 30 µM BA, fresh weight increase of ‘Redhaven’ was less than half that of ‘Com-Pact Redhaven’. This study suggests that compact growth habit in peach can be selected in vitro based on reaction to BA. Chemical names used: N-(phenylmethyl)-lH- purin-6-amine (BA), lH/-indole-3-butyric acid (IBA).