Other names: Bitter Gourd, Balsam Pear, Foo Gua, Foo Gwa, Ku Gua, Fwa Kwa, Fu Gua. Water soaking is recommended before germination. Nicking helps germination. Optimum germination temperature: 30-35°C. Low soil temperature results in low germination or no germination. Bitter melon seeds must be stored in a cold and dry place. They lose viability rapidly if kept in room temperature.