POT SIZE ON COLE CROPS PRODUCTIVITY IN ROOFTOP GARDENING

The experiment was conducted during the rabi season of 2020–21 on rooftop of On-Farm Research Division (OFRD), Bangladesh Agricultural Research Institute (BARI), Bandarban station, to find out the influence of pot size for cultivating three popular cole crops in Bangladesh (broccoli, cauliflower, and cabbage). Four pot sizes (8, 10, 12, and 14 inches) were used as treatments in this experiment, which followed a completely randomized design (CRD) with three replications. The results showed a significant relationship between pot size and crop yield. Among all the pot sizes, the highest marketable yield of broccoli, cauliflower, and cabbage was found from 14-inch pots (261.33 g, 925.33 g, and 1105 g), while 8-inch pots yielded the lowest for all three crops (74.67 g, 330.67 g, and 300 g) respectively. Interestingly, the cauliflower plants in the largest pots (14 inches) took the longest time to mature (61.33 days), while delayed curd formation in broccoli (54.67 days) and head formation in cabbage (66.33 days) was found in 8-inch pots. Overall, cole crops like broccoli, cauliflower, and cabbage yielded more in larger pots (14-inch) compared to smaller pots.