Field experiments were conducted during kharif, 2013 and 2014 under rainfed situations on Vertisols of Main Agricultural Research Station, University of Agricultural Sciences, Dharwad which is located in the northern transition zone of Karnataka at 15o26’ North latitude, 75o 07’ East longitude and at an altitude of 678 m above mean sea level. It is necessary to understand the knowledge of plant environment interaction for increasing yield of crop. The present experiments were designed to study the crop weather relationships (interactions) in maize under different sowing windows and planting geometry. Grain yield had highly significant positive correlation with LAI during silking (0.87**), days to physiological maturity (0.90**), plant height during physiological maturity (0.90**), Grainy Degree Days (GDD) during physiological maturity (0.93**), Heat use efficiency (HUE) during physiological maturity (0.63**), Light absorption ratio during silking (0.81**) and per cent APAR during silking (0.85**). But, grain yield was negatively correlated with Light transmission ratio during silking (-0.81**)