Abstract: The apricot tree has a great capacity of adaptation to the dry climate of Wilaya of M’sila, this study with for goal to know the behavior of four varieties; apricot tree in the area of Boukhmissa (area of M’sila), through observations on the ground in order to follow the various stages phenologic of the tree. The results obtained show that the most adapted varieties are the variety Paviot and Red Louzi because their phenology is in harmony with the conditions of the medium of the arid area of M’sila. Two early varieties; Tounsi and Bulida are adapted to this area because of the coincidence of their flowering with the period of cold Spring which led to a disturbance of the output.