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Weeds are one of the major problems in crop production systems around the world with devastating consequences. Thus, suitable plant spacing and effective weeding regime is very important in the management of the competition between carrot and weeds at critical growth stages of the crop. The experiment was conducted at Igbariam to determine the effect of weeding frequency and fertilizer application rates on the growth and yield of carrot (Daucus carota L.) in 2022 and 2023 cropping season. It was laid out in a 3×3 factorial experiment in a randomized complete block design (RCBD) with three replications. The selected weeding frequencies (zero weeding, weeding twice and weeding thrice) were the main factor while the three plant spacing (0, 200 and 400 NPK 15:15:15 kg/ha) consisted of the sub-factor. Data collected were subjected to analysis of variance (ANOVA) and significant mean were separated using Fisher’s Least Significant Difference (LSD). The tallest Plant height (12.0 cm) and number of leaves (52cm) in 2022 were obtained in the plots of twice weeding frequency while fertilizer rate of 400kg/ha had the best fresh weight effect (140 kg/ha) followed by 200kg/ha (130kg/ha).