ABSTRACT The research is to know the effect of seedling bulb diameter and plant growth regulators to the yield and growth of Gladiol (one of cut flowers). It has been done since June 9, 1996 up to October 25, 1996 which is located at Bandungan Horticulture Seed Centre, Ambarawa Sub Dis- trict, Semarang District. Its soil is Latosol and is on 800 meters on the sea and its pH is of 6,…