The drying kinetics of Roselle (Hibiscus sabdariffa L) of variety Terengganu (UMKL-1) and the quality attribution of Roselle were studied. The experiments were conducted using four different drying methods, including solar greenhouse drying (SD), solar greenhouse with intermittent heat pump drying (SIHP), hot air drying (HA) and heat pump drying (HP). Among the four drying methods, HP achieved the highest drying rate at a range from 0.054 g H2O center dot(g DM)(-1).min(-1) to 0.212 g H2O center dot(g DM)(-1). min(-1) while SD had the lowest drying rate, measured at 0.042 g H2O center dot(g DM)(-1).min(-1). The analysis on colour kinetics revealed that there is no significant colour loss (p > 0.05) observed from HP's dried Roselle. Greater amount of flavonoid compounds i.e. protocatechuic acid was found in SD and SIHP dried finished product whereas HP's dried Roselle contains higher percentage of catechin as compared to other drying methods. (C) 2017 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.