This research was conducted to evaluate the growth response, production and biofertification of Hipa 18, Hipa 20 and Hipa 21 rice plants to application time of Zn fertilizer on swampland. This research was carried out from October 2021 to January 2022 at Pemulutan Dalam, Kertapati.This study used a factorial randomized block design with of 9 treatments, consisting of three varieties namely Hipa…