MUSTARD Seeds, Tatsoi

Tatsoi (Brassica rapa subsp. narinosa), also called spinach mustard or rosette bok choy, is an heirloom, open-pollinated Asian green forming flat rosettes of glossy, spoon-shaped leaves on pale green stems. Mild, tender, and quick to grow.

At a glance

• Botanical name: Brassica rapa subsp. narinosa
• Type: Heirloom, open-pollinated Asian green
• Mature height: 6 to 12 inches, rosette form
• Sun: Full sun to partial shade
• Soil: Fertile, well-drained, slightly acidic to neutral
• Spacing: 4 to 8 inches

Best for

• Salads and baby greens
• Stir-fries and soups
• Cool-season and fall gardens
• Containers and tight beds

How to grow

Sow in early spring or late summer in fertile, well-drained soil and full sun to partial shade, spacing plants 4 to 8 inches apart. Keep the soil consistently moist for tender, succulent leaves. Harvest whole rosettes or pick outer leaves. Cool weather brings out the best flavor.

Flavor profile

Sweet and tangy with a light mineral finish when raw, turning warm and spinach-like when cooked.

About 99Heirlooms

99Heirlooms is a seed company devoted to heirloom and open-pollinated varieties, giving home gardeners dependable seeds with the character and heritage of generations past.