Branch pruning and chicken manure application were studied to improve broccoli growth and yield in a lowland area. The research found that both branch pruning and chicken manure had a significant impact on the number of leaves, leaf width, head weight, and head diameter of the broccoli plants. The best results were achieved with 50% branch pruning and 20 ton.ha-1 chicken manure, resulting in a head weight of 1048.33 g.plant-1 and a leaf width of 1705.41 cm2.