The study analyses the economics of coconut production under organic farming in Coimbatore District of Tamil Nadu. Participatory Guarantee Scheme (PGS) was studied in accordance to how farmers get their organic farming certification under PKVY scheme in Tamil Nadu. The estimated variable cost was Rs. 43,025/ha. The total cost of cultivation was Rs.82,216/ha. The net income over operational cost was Rs.2,95,888/ha and net income over total cost was Rs.2,56,697/ha. Total yield was increasingly responsive with higher application of farm yard manure and bio- fertilizers. Results of scale efficiency shows majority of the farms were operating in optimum return to scale. Inadequate supply of labour and inadequate market for organic products poses as major constraints to organic coconut farming in the area of study.
 Aim: The purpose of the study was to find out the profitability level and responsiveness of yield with input application of organic farming through Participatory Guarantee Scheme (PGS) and how farmers actively involved in organic farming to conserve natural resources.
 Design of Study and Methodology: The study was conducted in Coimbatore district of Tamil Nadu (2020) with 60 sample respondents. Purposive sampling was adopted for the study and two blocks were selected based on the leading operator of PGS scheme. The data were collected through well-structured interview schedule which was prepared through pre-tested survey. The analytical methods followed in the study included cost and returns estimation, resource use efficiency and data envelopment analysis to reveal the exact scenario of organic farming practices.
 Findings of the study:
 The study showed about
 
 Organic coconut is found to be one of the most important and sustainable crop options.
 Estimates of Resource Use Efficiency show that coconut yield was relatively higher with use of farm yard manure and bio- fertilizers, compared to all other organic inputs
 Nearly, 32.5 per cent of the farms considered under study were found to be operating in constant returns to scale.
 The major marketing constraint faced by the sample farmers through organic farming was inadequate supply of labour and price fluctuations of coconut.