Sweet sorghum is mainly cultivated for the sweetness of its stems and the quality of its fodder. Unfortunately, its cultivation is gradually being abandoned in Burkina Faso due to climatic hazards. In a general context of strong variations in the rainfall regime, it is, therefore, important to determine the e‡ect of the sowing period on the expression of agromorphological traits and Brix content. Thus, 29 sweet sorghum accessions were evaluated using 15 quantitative variables in a three-replicate Fisher block design with two sowing dates spaced 25days apart. •e results of the study showed that only stalk length (pr.0.519) and internode length (pr. 0.367) were not signi”cantly in•uenced by sowing date. Indeed, delayed sowing resulted in an increase in the number of vegetative (+2.44) and useful (+1.3) tillers, as well as Brix (+1.16%). However, a reduction in leaf area (−4.35cm×1.43cm), plant height (−85.69cm), panicle length (−2.63cm), and panicle weight (−6.19g), as well as a reduction in the sowing-to-•owering cycle from 3 to 21 days, was obtained at the second sowing date. •us, all accessions are sensitive to photoperiod with photoperiodic coeffiicients varying from 0.19 (GB02) to 0.93 (BSA5). •ese results could be exploited in the sweet sorghum improvement program.