Tatsoi Mustard Green is a non-heading mustard that is very similar in flavor to spinach and Tatsoi Mustard Green is a remarkable Asian green that stands out with its glossy, spoon-shaped leaves forming a striking rosette pattern, bringing both elegance and utility to your garden. Renowned for its buttery texture and mild, earthy flavor with a hint of mustard spice, Tatsoi is a culinary treasure that shines in salads, stir-fries, soups, and even smoothies. Customers adore Tatsoi for its incredible cold-hardiness, allowing it to thrive even in frost, making it a dependable year-round crop. Its fast-growing nature ensures you’ll have a steady supply of fresh greens in as little as 25 days, perfect for those seeking quick rewards in their garden. The plant is not only visually stunning but also nutrient-dense, packed with vitamins A, C, and K, calcium, and antioxidants, supporting a healthy diet with every bite. Its compact size makes it ideal for small gardens, containers, or indoor growing, offering versatility for gardeners with limited space.

Also Known As: Spinach Mustard, Spoon Mustard, Tah Tsai, Tatsoi Cabbage, Rosette Mustard, Asian Spinach, Mustard Spinach, Flat Mustard, Chinese Mustard Green, Bok Choy Mustard.

Plant Name: Mustard Green, Tatsoi
Latin Name: Brassica rapa subsp. nipposinica
Days to Germinate: 5-10
Days to Harvest: 40
Plant Height: 8 - 12 Inches
Spread: 8 - 12 Inches
Growth Habit: Upright
USDA Zones: 2-11
Lifespan: Annual
Brand: TomorrowSeeds
Sunlight: Full Sun, Partial Shade
Pollination: Heirloom, Open-Pollinated
GMO: No
Fungicide-Treated Seeds*: No
Seeds Packed For**: 2025
*Fungicide-treated seeds protect the seedlings from diseases until they are up and growing. Do not eat treated seeds.
**Seeds are freshly packed for the growing season of the year listed. Seeds are still viable beyond pack date. Store in a cool and dry location such as the refrigerator or basement to best preserve germination rates.

Planting Instructions:

Soil Preparation:

Choose an area with heavy, well-draining soil that receives at least 6 hours of sunlight each day. Remove weeds, large rocks, and litter from the planting area. Leave small weeds and dead grass, they will enrich the soil when turned under. Spade or till the soil 8-12 inches deep. Loosening the soil will help the plant establish strong roots.

Plants grow best in soil with lots of organic matter. You may optionally add fertilizer or organic material such as compost, leaves, or rotted hay to mix into the soil at this point. For small gardens, scatter 2-3 tablespoons of fertilizer evenly and work into the top 2-3 inches of soil for each hill or 2 foot by 2 foot planting area. For larger gardens, scatter 2-3 pounds of a complete fertilizer for each 100 square feet of planting area. Work fertilizer or organic material into the soil and leave the surface smooth.

Form rows of soil beds 4-6 inches high and at least 12 inches apart. This formation of ridges will help with drainage.

Planting:

Plant Tatsoi Mustard Greens in early spring 4-6 weeks before the last expected frost date and the soil begins to warm (>45F). For fall crops, direct sow seeds 6-8 weeks before the first frost. To plant, make holes 1/4 inch deep and spaced 10 inches apart down the rows of raised beds. Plant 1-3 seeds per hole, planting 2-3 seeds if choosing to thin to the strongest plant. When thinning, determine the strongest and healthiest plant, then remove all other plants, narrowing to a single plant per hole. Cover seeds thinly with soil and water after planting. Plant every 2-3 weeks for a continuous crop.

Planting Depth:	1/4 inch
Within-Row Spacing:	10 inches
Between-Row Spacing:	12-18 inches

Care During the Season:

Watering: Water the plants deeply, soaking the soil to a depth of 6-8 inches, once a week. If there is no rainfall, water 2-3 times a week. Sandy soils may need to be watered more often than heavy clay soils.

Weeding: Keeping plants weed-free improves production. If plowing or hoeing, do not dig deeper than 1 inch to prevent from cutting the feeder roots.

Fertilizing: Once seedlings are established, 2-4 weeks after planting, you may optionally apply 2 tablespoons of a complete fertilizer around each hole, or 1-2 pounds per 100 square feet, without letting the fertilizer touch the plants. Water plants after fertilizing.

Insecticides: Insecticides may be used to protect plants. Bt-based insecticides and sulfur are organic options that can be used for prevention. Sulfur also has fungicidal properties and helps in controlling many diseases. Before using a pesticide, read the label and follow cautions, warnings and directions.

Diseases: If spots or mold appear, treat plants with an approved fungicide. Neem oil, sulfur, and other fungicides may be used. When using fungicides always follow label directions.

Harvesting:

Tatsoi Mustard Greens can be harvested at any stage. For tender, baby leaves, harvest when they are about 4-5 inches long, around 3 weeks after planting, perfect for fresh salads and garnishes. If you prefer mature, more robust leaves, allow the plant to grow for 6-7 weeks until the rosette is fully formed, with leaves reaching up to 10 inches long, ideal for stir-fries, soups, and steaming. Snipping the outer leaves allows the inner growth to continue. Alternatively, for a full harvest, cut the entire rosette at the base, just above the soil.