Mulberry silk is produced by feeding mulberry leaves (Morus sps.) to silk worm larvae known as Bombyx mori L. The larvae at the end of their larval span spun shells known as silk cocoons to protect their next metamorphic forms (pupae). The cocoons are used for extraction of silk filament. In successful harvest of cocoons, 38.2% role is played by quality mulberry leaves. Growing mulberry is an agro-based activity. But due to urbanization and globalization, the existing mulberry growers have switched over to other avocations as a result the existing mulberry gardens have become obsolete in leaf production for want of proper care and desired input. So to improve the quality of mulberry leaves the present research work was undertaken. Here different concentrations of Growth Retardant (CCC) were sprayed on mulberry plants during summer and spring seasons. The treated leaves were analysed for morphological and bio-chemical changes and also fed to silkworm larvae. Significant improvement in foliage, nutrient value and also improvement in silk content were observed. So CCC has been found a useful growth retardant for improvement of mulberry foliage.