The combining ability and heterobeltiosis analysis was carried out in gladiolus based on 7 x 7 half diallel for growth traits during 2005 to 2007 utilizing seven varieties viz. American Beauty, Sylvia, Melody, Summer Sunshine, Vedanapoli, Magic and Priscilla. The varieties American Beauty, Summer Sunshine and Priscilla were good general combiners for many traits. The important hybrid exhibiting significant heterobeltiosis and sca effect are Sylvia x Priscilla and Sylvia x Melody. The range of heterobeltiosis for plant height varies from -20.54 per cent to 14.72 per cent and for number of leaves it ranges between -13.86 to 17.31 per cent. Additive type of gene action was noticed for many traits.