Seed Needs, Tatsoi Mustard (Brassica narinosa) 300 Seeds Non-GMO Quality Mustard seeds packaged by Seed Needs. Intended for the current and the following growing season. Packets are 3.25" wide by 4.50" tall and come with a full colored illustration on the front side, as well as detailed sowing instructions on the reverse. Tatsoi Mustard will produce distinct, emerald green, spoon shaped leaves. The leaves are tightly packed, surrounding a center stem. The stalks are sweet in flavor, with a mustard taste, similar to Mache. The plants themselves will reach a mature height of 8 to 12 inches tall, and will spread about the same in width. Tatsoi Mustard is ready for harvesting in roughly 45 to 50 days. Tatsoi Mustard is grown as an annual plant. This means that they will grow quickly from freshly harvested seeds, producing their spoon shaped leaves through the summer months, only to be harvested later on. All Mustard seeds sold by Seed Needs are Non-GMO based seed products and are intended for the current & the following growing season. All seeds are produced from open pollinated plants, stored in a temperature controlled facility and constantly moved out due to popularity.