The research work was conducted to study the performance of genotypes of ajowan (Trachyspermum ammi L.) at the Department of Spices and Plantation Crops, Horticultural College and Research Institute, TNAU, Periyakulam. Twenty genotypes of ajowan were evaluated under field conditions to assess the growth, yield, quality and physiological attributes. Per se performance, magnitude of variability and degree of association of characters, direct and indirect effect were studied for growth, flowering, physiology, yield and quality traits of ajowan genotypes. Among the genotypes evaluated, the...