Black rice (Oryza sativa L. “Cempo Ireng”) is one of the local rice varieties in Sleman Regency, Yogyakarta. Its black color is caused by a high anthocyanin content, which is an important source of antioxidants. The cultivation of black rice is still limited due to its tall phenotype, long vegetative stage, and lower productivity compared to white rice. Paclobutrazol is a growth retardant t…