Crotalaria retusa L. is a type of Leguminoceae plant that has a high chance of being developed and utilized in the health and agroforestry fields. However, the hard skin of the C. retusa seed limits germination and inhibits seed availability, so scarification is necessary. This study aimed to break the dormancy of C. retusa seeds using chemical scarification in the immersion of KNO3 solution. T…