As a result of contrasting sowing dates, mean temperatures explored by control treatments during the vegetative phase (VE-R1) in Exp1 were higher (25.0◦C) than in Exp2 (21.4◦C) while mean temperatures during the reproductive phase (R1–R7) had the opposite trend: 21.3◦C in Exp1 and 24.6 in Exp2. Within each experiment, as a consequence of the effects of photoperiod extension treatments on crop development (see Section 3.2), mean temperatures during the reproductive phase were lower when photoperiod was extended, with respect to the control: 19.1◦C (Exp1, 3 h),24.1◦C (Exp2, 1.5 h) or 23.2◦C (Exp2, 3 h).