Weeds compete with crop plants for water, nutrients, space and solar radiations by influencing crop growth and reduction of yield up to 20 to 50% (Kushwaha et al., 2002. Celosia argentea L. is an important potherb in Nigeria. Its cultivation spans both the rainy and the dry seasons. Becpause of its inclusion as a major source of vitamins and minerals in local diets, it is important to discourage influences of inter and intra-row weeds on its growth. This intention thus informed this study; which focused on monitoring the effects of weeds on the agronomy of C. agentea at various weed densities. The results point to the direction that optimum agronomic and yield performance of the crop is obtained where there is reduced incidence of weeds and better management of weed population.