Growers of the hill ecosystem, assess soil fertility by visualizing the luxuriant growth of weeds (Ageratum conyzoides). Since a long time, they have been using this as a soil fertility indicator as indigenous knowledge. Thus, the present study was conducted to quantify weed density, crop performance, soil fertility status and correlate with growers view by enquiring from respondents. A total of 78 respondents were interviewed and their responses were filled in unorganized questioners. The major parameters viz. weed density, rice grain yield and chemical properties of soil were considered in this study. It was found that growers of the area have strong indigenous perceptions for assessment of soil fertility. Higher density, better rice grain yield and chemical properties of soils were found better indicator of soil fertility as per grower’s perceptions.