A field experiment conducted at Main Research station, University of Agricultural Sciences, Dharwad during kharif 2002 to evaluate the effect of sowing time (second fortnight of June, first and second fortnights of July and first fortnight of August) and fertilizer levels (0:0:0, 12.5:25:12.5. 25:50: 25 and 37.5:75:37.5 kg N, P2O5, K2O ha-1) on seed production of sunnhemp, revealed that early sowing of sunnhemp during second fortnight of June recorded significantly higher seed yield of 2263 kg ha-1 than delayed sowings. Sunnhemp responded to higher fertilizer levels. Application of 37.5:75:3.75kg N, P2O5, K2O ha-1 recorded significantly higher seed yield (1562 kg ha-1). Combination of early sowing in the second fortnight of June and fertilizer of 37.5:75:37.5 N, P2O5, K2O ha-1 recorded the higher seed yield of 2720 kg ha-1 .Economics also clearly revealed higher gross return (Rs.41570  ha-1), net return (Rs. 27530 ha-1) and B:C ratio (2.90) with early sowing of sunnhemp with higher fertilizer level.