Mustard Seeds - Jeok Gat. Heirloom, Brassica juncea. 40-50 days to mature. Non GMO. Cool season annual. This attractive mustard is popular in Korea and North China. It has vigorous deep purple-red leaves with ruffled edges and a green mid rib. The thick young leaves are tender and spicy with an excellent flavor. Harvest at any stage--microgreens, baby leaf or at full maturity. Good for mild climates. ~ 16,100seeds / oz.