The deepest purple baby leaf mustard we've ever seen! Japanese Deep Purple Mustard Seeds make a great component for salad mixes because the intense leaf colour and medium-hot mustard flavour. Harvest baby greens in as little as 20-25 days! Mustard greens are surprisingly cold hardy and may grow all winter given some protection from really hard frost. Try planting this cold hardy mustard in a raised bed in September. Add a cloche cover by mid-October, and enjoy the greens throughout the winter. Or try some of the seeds as microgreens, grown indoors using artificial light. They're spicy and full of flavour.