Tatsoi Tah Tsai is high in Vitamin A, B, and C. Mustard greens are very popular. Brassica seeds are a beautiful, easy-to-grow delight. It adds rich color, mild flavor, and nutrition to salads. #Tah Tsai seeds are suitable for growing in containers or growing for baby greens, or even microgreens. Grown as a baby leaf vegetable, tasty leaves that enliven salad mixes.