Experiments were conducted through 2022/2023 and 2023/2024 seasons of to evaluate the growth and productivity of celery plants (Apium graveolens L. var. secalinum) grown at two different locations in Egypt: the research station of Ali Mubarak in El-Beheira Governorate and Arab El-Awamer research station in Assiut Governorate, during four transplanting dates: December, January, February, and March. Results revealed that plants grown in sandy soil at Ali Mubarak conditions showed greater growth than those grown in the calcareous sandy soil at El-Awamer conditions. Plant height increased by 24.20%, and the number of stalks increased by 11.93%. and yield increased 23.31%, as well as nitrogen (N), phosphorus (P), and potassium (K) contents being relatively higher in celery plants grown under Ali Mubarak conditions than in those grown under El-Awamer conditions. However, the highest amount of chlorophyll content was achieved with plants planted in March under El-Awamer conditions, which increased by 23.14%. The significantly highest essential oil content and transformation of hydrocarbons into oxygenated components, along with enhanced vitamin C and antioxidant activity, were obtained with plants grown in February under El-Awamer conditions. while the highest value of the phthalides component was obtained with plants grown under Ali-Mubarak with the last transplanting dates in March. It could be concluded that the optimal transplanting dates for achieving maximum yield and quality in the two studied locations were determined to be January. Furthermore, the Aly Mubarak site emerged as the premier location for celery production, while the Arab El-Awamer site yielded superior oil content and quality of celery plants.