This investigation was carried out to evaluate the genetic behaviour of earliness and vegetative traits of maize at two locations.  Therefore, 11 inbred lines of maize were crossed among them according to factorial arrangement to obtain 30 F₁ hybrids.  Five inbred lines were used as male parents while six inbred lines were used as female parents.  All genotypes (41) were evaluated at two locations.  The first location was the farm of Genetic Department, Faculty of Agriculture, Mansoura University (L₁) while the second location (L₂) was the farm of Faculty of Agriculture, SohagUniversity.  Different earliness and vegetative traits were studied.  These traits were: plant height   in centimeters  (P.H.), number of leaves per plant (No. L./P.), leaf area (L.A.), number of days to 50% tasseling (No. D. 50%.T.) and number of days to 50% silking (No. D. 50% S.). The results of the combined analysis indicated that all studied vegetative and earliness traits showed significance among evaluated genotypes.  Similarly, the interaction between genotypes and location (g x L.) were also significant for all studied traits except P.H.  The results also revealed that P.H. and N.L./P. showed positive and highly significant values of heterosis versus the mid-parents.  On the other hand, the two earliness traits (No. D. 50%. T.) and (No. D. 50%. S.) showed significant and negative (desirable) values.  The results cleared that the variances of male, female and M. x F. were significant for most studied traits.  The results indicated that the values of heritability in brood and narrow senses were medium for most studied traits.