- Common in Southern gardens, the Southern Giant Curled Mustard originates in the Himalayan region of India and spread throughout China.
Non-GMO, Heirloom Southern Giant Curled Mustard Seeds from True Leaf Market. Southern Giant Curled Mustard is a staple in Southern gardens. It has large, bright green fringed and curled leaves with a mild flavor. Originating in the Himalayan region of India over 5,000 years ago, mustard greens spread throughout China and then the rest of the world.