Abstract
The research was conducted at the Food Security Office of Medan City Jl. Kramat Indah /Selambo Ujung . The purpose of this study was to determine the effect of Gandasil D fertilizer on the growth and yield of pakcoy (Brassica rapa L), to determine the effect of watering frequency on the growth and yield of pakcoy (Brassica rapa L) and to determine the effect of both on the growth and yield of pakcoy (Brassica rapa L). Based on the results of the study, the treatment of Gandasil D fertilizer had a very significant effect on plant height, number of leaves, leaf area, wet weight, selling weight with a fertilizer concentration of 3 g / l water and a watering frequency of 1 time in one day compared to 1 time in 3 days of watering and the interaction between the treatment of Gandasil D fertilizer and watering frequency had a significant effect on plant height, number of leaves, leaf area, wet weight, and selling weight.