The experiment was conducted at the research farm of the Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during March 2008 to February 2009. The lines CS001, CS002, CS003, and CS008 were used in the present experiment in which CS001, CS002, CS003 were collected from Siddique Bazzar, Dhaka; while CS008 was collected from Tangail. These materials showed better performances in respect of foliage production in an earlier experiment. The experiment was laid out in split-plot design with three replications. Different sowing dates viz. 01 March 2008 (D1), 15 March 2008 (D2), 01 April 2008 (D3), 15 April 2008 (D4), 01 May 2008 (D5), 15 May 2008 (D6), 01 June 2008 (D7), 15 June 2008 (D8), 01 July 2008 (D9), 15 July 2008 (D10), 01 August 2008 (D11), 15 August 2008 (D12), 01 September 2008 (D13), 15 September 2008 (D14), 01 October 2008 (D15), 15 October 2008 (D16), 01 November 2008 (D17), 15 November 2008 (D18), 01 December 2008 (D19), 15 December 2008 (D20), 01 January 2009 (D21), 15 January 2009 (D22), 01 February 2009 (D23), and 15 February 2009 (D24) were assigned in main plot and four genotypes viz., CS001, CS002, CS003 and CS004 were assigned in sub plot. The unit plot size was 3 ×1 m. Fertilizers were applied @ 5 tons cowdung, 90 kg urea, 50 kg TSP and 50 kg MoP per hectare (Moniruzzaman, 2011). The entire amount of cowdung, phosphorus from TSP and potassium from MoP with one-half of nitrogen from urea was applied during final land preparation. The rest of the nitrogen was applied at 20 days after sowing of seeds as top dress. The seeds (fruits) were rubbed for separating the mericarps (seeds) and were soaked in water for 24 hours to enhance germination. Seed were also treated with Bavistin @ 2 g per kg of seeds before sowing. The seeds of each genotype were sown in rows 10 cm apart continuously by hand @ 50 kg/ha according to the sowing dates. First weeding was done at 20 days after sowing (DAS). Plant thinning was not done. For good germination, water was given to the plots every three days by water can with fine mashed nozzle till germination. From March to May irrigation was done at 7 days interval after emergence. Then irrigation was done at 10 days interval after emergence according to the need of the field soil. Harvesting of plants was done by cutting just beneath the soil when few plants were seen to bolt depending upon the genotypes. Data were collected from the inner rows of each plot to avoid the border effect. In each unit plot 10 plants were selected randomly for recording data on plant height (cm), number of leaves/plant, plant weight (g) for foliage yield, number of plants/m2 , and plant weight /m2 . Plot yield was converted to per hectare yield. Weather data (air temperature and rainfall) were collected from the Weather Station, Dept. of Agricultural Engineering, BSMRAU, Salna, Gazipur . The collected data were properly analyzed statistically by MSTAT program and mean comparison was done following the Duncan’s Multiple Range Test (DMRT).