Abstract: The effect of soaking in wood ash on two varieties of Roselle (Hibiscus sabdariffa) red and green calyces was evaluated for their nutrient and toxic substances. The result showed a decrease in ash content (3.15%), crude lipid (10.89%) and moisture content (1.16%) in the roselle (red) calyx of the sample soaked in ash, while the crude fibre content (8.12%), carbohydrate content (79.68%) and protein content (6.64%) were high. The roselle (green) calyx soaked in wood ash also showed a decrease in the ash content (4.45%), crude lipid (0.85%), moisture content (78.91%). All the varieties soaked in wood ash were low in antinutritional content. Both the varieties soaked in wood ash showed increase in the potassium content, and when consumed will assist haemostatic control of the body.