An annual herbaceous plant belonging to the Lamiaceae family is the chia (Salvia hispanica L.). To investigate the impact of various environmental factors on the growth and oil content of Chia (Salvia hispanica L.) at various sowing dates (SD1 = September 20th, SD2 = October 5th, and SD3 = October 20th, 2021), field tests were carried out in the 2021–2022 seasons at the experimental farm of the National Research Centre, Nubaria, Behira governorate, Egypt. The findings revealed that SD1 had the tallest plants (118.2 cm), followed by SD2 (92.6 cm) and SD3 (63.8 cm). The quantity of shoots per plant, however, did not alter significantly. Between SD1 and SD2, SD3, and SD4, there was a significant difference in the plant fresh weight, with SD1 recording the heaviest plants. Between the three sowing dates, there were significant differences in the protein and oil percentages. Similar to crude fibre content, where SD1 displayed the highest value (34.181), SD1 displayed the highest values (28.06 and 19.97), but there was no appreciable difference between SD1 and SD2. SD3, however, had the lowest value.