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Tatsoi Improved Mustard Seeds

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Tatsoi Improved Mustard

SKU: MU9-1000

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Country Of Origin: Japan Japan

Availability: In stock

Price: $2.50

Your price: $2.00

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55 days. Brassica juncea. Open Pollinated. Tatsoi Improved Mustard. The plant produces good yields of flavorful, dark green spoon shaped mustard leaves. This oriental vegetable forms dense leaves that can also be harvested as a whole plant and bunched. Used in mixed salads, soups, cooked, or stir-fries. Also known as Tah Tsai Mustard. Cold Tolerant. Suitable for hydroponic gardening. Excellent choice for home gardens. United States Department of Agriculture, PI 662690. A variety from Japan.

Lot No: 102750

Germination: 85%

Test Date: 08/2025

Seeds Per Pound: 24,000

Plant Height: 12 to 18” Tall

Planting Season: Spring/Fall

Sunlight Requirement: Full Sun/Partial Shade

Planting Method: Direct Sow

Mustard Greens Brassica juncea

Seed Depth

Soil Temp. for Germination

Days to Germination

Sunlight Requirements

Planting Time

1/4 to 1/2"

55 F to 70 F

5 to 8 days

Partial Shade/Full Sun

Spring/Fall

USDA Hardiness Zone

Seed Spacing

Row Spacing

Space After Thinning

Days to Harvest

N/A

18 - 24"

35 - 65 days

Mustard Greens Planting Information:

Mustard Greens is also called Mustard and Mustard Spinach, is a Southern green. It has a stronger taste than Spinach and Swiss Chard. You can harvest Mustard Greens in the fall and spring in the South, as it is a cool weather crop. Mustard Greens is a hardy plant, but it does not do well in very hot weather. You can have successive plantings throughout the year. Mustard Greens seeds are usually planted directly in the garden. For spring planting, plant seeds 30 days before the last frost, and 70 days before the first autumn frost for a fall crop. Plants can grow 18 - 24" tall.

Soil Requirements:

Requires fertile, well-drained soil in a sunny location in the garden. Apply mulch and grass clippings, or straw, around the base of the plant.

Water Requirements:

Keep soil consistently moist. Water well during dry and hot spells.

Fertilizer Requirements:

Use Slow Release (6 Month) Fertilizer when transplanting outdoors. Apply Miracle-Gro periodically.

Harvest Tips:

You can cut leaves as you need them if you want the plant to produce more leaves, or you can cut the entire plant at ground level.

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Reimer seeds has over 5,000 quality vegetable, flower, and herb seeds for the home gardener and market growers. We do not sell any Genetically Modified seeds. This year we reduced our prices on many items, added new items, and have added additional bulk items by the ounce and pounds! Take time to review our impressive Online Seed Catalog. Sorry, we do not have a printed catalog to mail you. Plan your garden, and then order your varieties for this upcoming season. Please check back often, as we add new items regularly. If you don’t see an item you want you can always email us and we’ll see if we can bring it into stock!