Evergreen Bunching Nebuka Onion variety is a splitting type onion with long, slender white stalks that grow in tight clusters. This onion is an essential to Japanese and Chinese cooking, fresh or cooked, used as a garnish for baked fish, in soups, noodle dishes, or in stir-fries. Nebuka Evergreen Bunching is hardy and cold resistant. The stalks of 'Nebuka Evergreen Bunching' onions grow twelve to sixteen inches tall, multiply by division, and do not form bulbs under most conditions. Seeds can be sown in the spring or fall and can be harvested at just about any time. If allowed to overwinter, they will develop clumps that can either be harvested as an early spring treat or you can divide them and replant.