Field experiments were conducted at the Agronomy research farm, R.V.S.K. Vishwa Vidyalaya, Gwalior during rabi (winter) seasons of 2010-11 and 2011-12 to study the sowing dates and moisture conservation practices (MCP) on yield, quality and WUE in rainfed mustard (cv. Pusabold). Three different sowing dates (i.e. 11, 21 & 31 October) were used in the main plots and eight MCP including one hand weeding and mulching of paddy straw, grass & pearlmillet husk after weeding in two quantity (@ 2.5 & 5.0 t/ha) were used in sub-plots under split plot design. In general, the value of all growth and yield contributing characters had significantly lower value under delayed sowing. Highest seed yield (2380 kg/ha) was observed with 11 October sown crop followed by (2330 kg/ha) in 21 October sown crop and both higher over 31 October sowing date. The maximum net return, B:C ratio and WUE were recorded with October 11 sown crop which is closely followed by 21 October sown crop. Mulching with higher quantity (5 t/ha) gave significantly higher yield attributes and seed yield over its lower quantity of respective materials. Whereas, paddy straw observed superior among mulching material were used in present study. Maximum seed yield (2440 kg/ha) recorded with 5.0 t/ha paddy straw mulch applied after weeding by khurpi at 20 DAS. Highest oil content, B:C ratio and WUE were also noted in this treatment.