The aim of our research was to study the effects of high temperature regimes on cherry tomato plants cultivated in different cultivation systems at different growth stages. Our objective was to assess the critical temperature at a precise growth stage, and thereafter propose an appropriate cultivation system which can mitigate the thermal stress during summer. Temperature and growing medium affected independently but strongly the leaf expansion. The critical effect of temperature was noted particularly during the flowering stage. This study enables us to determine the physiological effect caused by heat stress at precise growth stages and is a guide for us in choosing the effective growing medium suitable during summer.