Purple Choy Sum Seeds (Kosaitai / Hon Tsai Tai) – Chinese Flowering Cabbage, Purple Stems, Yellow Flowers, 50 Days

Purple Choy Sum – Kosaitai / Hon Tsai Tai (Brassica rapa var. purpurea)

Purple Choy Sum (Kosaitai / Hon Tsai Tai) is a striking and popular Chinese specialty vegetable with vivid purple leaf stalks and veins, dark green leaves, and cheerful yellow flowers. Also known as Yu Choy Sum, flowering pak choy, or Chinese flowering cabbage, this heirloom variety is prized for its tender, mildly sweet stalks and its productive, branching habit that delivers an extended harvest throughout the cool season.

Harvest the main stalk when it reaches 10–14" tall and just before flowering — after cutting, the plant branches freely to provide weeks of continuous harvest. Stalks, leaves, and flower buds are all edible and delicious in stir-fries, soups, and steamed dishes.

Seed Details

• Common Names: Kosaitai, Hon Tsai Tai, Yu Choy Sum, Purple Stem Choy Sum
• Also Known As: Cantonese pak choy, Chinese flowering cabbage, flowering pak choy, mock pak choy, edible rape
• Leaf: Dark green with purple stalks and veins; yellow flowers
• Flavor: Mild, tender, slightly sweet
• Days to Maturity: ~50 days
• Type: Cool-season annual; heirloom, non-GMO, open-pollinated
• Planting Season: Late summer to early fall
• Best Use: Stir-fries, soups, steamed, sautéed, garnish

Growing Instructions

• Prefers cool temperatures. Prepare fertile, well-drained soil; sow seeds in late summer/early fall in a sunny location.
• Keep soil consistently moist; fertilize as needed.
• Harvest the main stalk when it reaches 10–14" tall and just before flowering.
• After the initial cut, the plant branches freely for an extended, productive harvest.

Select your desired seed quantity above. Heirloom, non-GMO, open-pollinated.