The research was carried out in the Workshop of Teaching and Research of Horticultural Plants (TEIPH), of the Faculty of Agronomy-UNAP, located at Km. 3 of the road to Quistococha-LLanchama, located south of the city of Iquitos, presenting the following coordinates in UTM: 9576237 North and 682157 South and the Altitude of 126 meters above sea level. The type of research was experimental, explanatory with an independent variable (transplant age) and nine dependent variables (plant height, stem length, stem diameter, root length, plant diameter, number of petioles/plant, total plant weight, petiole/plant weight and petiole/ha weight); the objective of the research work was to determine the influence of the transplant age on the agronomic characteristics and performance of Apium graveolens L. "celery", Zungarococha-Loreto. The experimental design used was the Completely Random Block Design...