Two field experiments were conducted to evaluate the efficacy of different garlic treatments against basal stem rot, root rot and broomrape of geranium and its productivity at the Exp. Farm of Sids Hort. Res. Stat., Agric. Res. Center, Beni-Sweif governorate during 2016 and 2017 growing seasons. It was observed that using garlic as intercropping with geranium, soil amendment in addition to spraying garlic extract effectively controlled basal stem and root rot as well as decreased the infection by broomrape. These treatments enhanced plant growth, oil and its chemical composition, where, intercropping of garlic with geranium plants as a treatment gave the highest mean values of oil (%) and oil yield (kg/fed.), respectively for the two plant cuts followed by soil amendment with garlic and spraying geranium plants with garlic extract.