Prohexadione-calcium (ProCa) and paclobutrazol (PBZ) are potential growth retardents used in fruit crops. These compounds are attributed to interference with gibberellin biosynthesis and controls vegetative growth of plants. Toxicity of prohexadione-Ca and paclobutrazol on environment is low and negligible. prohexadione-Ca and paclobutrazol are recently registered to use on small fruit crops. Hence, in the present investigation the effects of ProCa and PBZ on inhibition of vegetative growth particularly runner formation, and crown branching in two local an exotic genotypes of strawberry namely ‘Kurdistan’ and ‘Gavitoa’ respectively were evaluated. ProCa at concentration of 125 mg L -1 were foliar sprayed twice, with two weeks interval. Paclobutrazol at a concentration of 75 mg L -1 at was foliar sprayed once alongwith the first time of Prohexadione-Ca. The layout was 2×4 factorial experiment in a complete randomized design with three replications. The results indicated the sinificant inhibiting effects of prohexadione-calcium and paclobutrazol on leaf area , petiole length, runner length, number of runners and increasing the number of crown branching in both genotypes. In both chemical treatments a significant increase were observed in crown branching and chlorophyll content. Increasing in crown branching and chlorophyll content were the greatest when prohexadione-calcium applied twice at concentration of 125 mg L -1 . ProCa showed great potential in terms of increasing branch crowns and growth retardant for controlling runner length and numbers in both genotypes of strawberries. Key Words: prohexadione-calcium, Paclobutrazol ، strawberry ، crown branching ، runners