A field trial was conducted during two consecutive Rabi season of 2016-17 and 2017-18 on loamy sand soil at AICRP-Weed Management, B.A. College of Agriculture, Anand Agricultural University, Anand (Gujarat) to study the effect of integrated weed management in fennel production system and its residual effect on succeeding summer greengram. Significantly, lowest and highest weeds density at harvest was recorded with farm yard manure (FYM) 20 t/ha and vermicompost 8.0 t/ha, respectively. However, highest fennel seed yield (2.09     t/ha) was recorded with vermicompost 8.0 t/ha application. Significantly higher plant height, number of umbels/plant and seed yield was recorded with paddy straw mulch 10 t/ha fb hand weeding (HW) at 30 and 60 days after transplanting (DATP) and it was at par with paddy straw mulch 5 t/ha fb HW at 30 and 60 DATP and twice inter cultivation (IC) + HW at 30 and 60 DATP fb earthing-up at 75 DATP. Higher fennel equivalent yield (2.43 t/ha) and gross return ( 243000/ha) was recorded with application of vermicompost 8.0 t/ha, while highest net return ( 138220/ha) and benefit cost ratio (2.56) was recorded with application of FYM. Paddy straw mulch 10 t/ha fb HW at 30 and 60 DATP recorded higher fennel equivalent yield (3.24 t/ha), gross returns ( 219816/ha), net returns ( 241976/ha) and benefit cost ratio (3.11). Application of FYM and vermicompost was found equally effective while mulching treatments recorded higher seed yield of succeeding greengram.