In the experiment, observations viz. seed diameter, area of seed, seed perimeter, length of seed and width of seed were recorded. Results revealed that all the characters were significantly affected by sowing dates, varieties and their interaction effect in Kharif, Rabi and summer season. The highest values for physical seed quality characters in Kharif were recorded in the crop sown on June 1^st followed by 15^th January in summer and 15^th October in Rabi season. Variety JS-335 (V₂) had higher physical seed quality in all the three season, irrespective of variety. The most optimum off season date of planting of soybean was January 15^th in summer and October 15^th in Rabi season.