Mustard Seeds - Chirimen Hakarashi. Heirloom, Brassica juncea. 55 days to maturity. Non GMO. Cool season annual. This is a popular and particularly tasty Japanese winter curl leaved mustard. The round stalk of this variety grows curly, crispy leaves that are serrated on the edges. The leaves grow spicier and hotter as the plant matures. Prepare fertile, well-drained soil. Sow seeds in early/late spring or late summer/early fall in a sunny location. Keep soil moist. Fertilize as needed. Plant every 2 weeks for continuous harvest. The flavor is best when grown briskly so plant in fertile soil and keep well watered. Start harvesting at 3 tall for baby mustard greens. Thin to 10" apart for mature heads. May bolt as temperatures and day lengths increase. Harvest florets as they are tender and delicious too. Harvest at any stage, microgreens to baby leaf for salads and sandwiches, as well as flowers and seed pods. Mature leaves are excellent for pickling, cooking and juicing. Approximately 10000 seeds / oz."