The Citrullus lanatus (watermelon) is one of the most important fruit crop grown in tropical regions and eaten around the world. The, the present study aimed to examine the Growth rate, trend and Instability in area and production of watermelon in Haryana and Karnataka. For growth rates CAGR, and for instability Coefficient of Variation (CV), and Cuddy Della Valle’s instability indices were used. The study was based on secondary data. Data related to the area, production and productivity of watermelon was collected for the period 2011-2020 from different published reports. In India, the results showed that, the area, production and productivity of watermelon have an increasing trend over the period from 2011 to 2020, similar trend was observed in Haryana state but, in Karnataka the area and production showed a decreasing trend, while productivity followed an increasing trend with the growth rate of 1.78 per cent due to improved technology. In Haryana, the instability in the area and productivity was moderate found to be (15.52 and 20.39%), similarly, in Karnataka the instability in the area and production was moderate (18.79 and 15.51%).