A field experiment was carried out at Organic farm, Navsari Agricultural University, Navsari in rabi 2013-14 to study the influence of paddy straw and organic manures on growth, yield, quality and economics of onion (Allium cepa L.) in organic farming. The effect of paddy straw and different percent of organic manure were significantly increased growth parameters, yield attributes, fresh and dry yield of leaves and bulb, quality parameters and economics of onion. Results showed that with combined application of paddy straw with decomposing culture and (16.7 N% BC: 33.33 N% VC: 33.33 N% CC) were significantly increased the plant height, number of leaves, polar diameter, fresh and dry yield of leaves and bulb, quality parameters, neck thickness and pyruvic acid of onion. From the present study, it is observed that combined application of paddy straw @ 5 t ha-1 with pseudomonas culture alongwith organic manure treatment of 16.7 % BC + 33.33 % VC + 33.33 % CC on N equivalent of RDN bases gave highest marketable yield of onion 34.07 t ha-1 with net realization of Rs. 460988 and BCR values of 3.9. The paddy straw should be incorporated at the time of field preparation and organic manure should apply in two equal splits (125 kg ha-1 N), at the time.