Vietnam is one of the best sources for high quality cassia. From here, cassia is shipped to many countries such as Taiwan, India, the USA, Thailand, the Netherlands... Although the price for this commodity in Vietnam is fairly high compare with Indonesian Cassia (Vera), but such high prices correspond to high quality, high oil content of the produce.
Cassia is grown in some regions of Vietnam, mainly in Yen Bai and Thanh Hoa provinces where the soil, the weather is very favorable for growing[...]