80-90 Days to maturity. Eryngium foetidum. Vietnamese Culantro Seeds - Ngo Gai Seeds. Annual heirloom. This herb belongs to the Apiacea family is often compared to parsley in flavor but is said to be even bolder. It is widely used as a seasoning in Thailand, India, Vietnam, and other parts of Asia. The thick Ngo Gai leaves are perfect for drying at home as they retain their color and flavor very well. Approximately 30,000 seeds per oz.