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Dwarf White Stem Pak Choi (Brassica rapa chinensis) is the famous Asian green — the classic “Baby Bok Choy” of Asian cuisine. This nai pe tsai dwarf type produces white spoon-shaped petioles and dark green, glossy leaves in a compact rosette just 3–4 inches tall and 12 inches wide. Mild and sweet flavor, compared to most kales and mustards. Grows in cool-warm seasons and can tolerate heat. Can be grown year-round in sub-tropical areas. Certified organic, heirloom, open-pollinated, non-GMO. 40–45 days to maturity.
Baby bok choy, ang chaithao, bai cai, bok choy, cai be trang, cai thia, cai thuong hai, celery mustard, Chinese chard, Chinese mustard, Chinese white cabbage, paak tsai, pak choi, pechay, petsai, qing cai, shakushina, tsing pak choi, and many more across Asian languages.
Prepare fertile, well-drained soil (pH 6.0–6.8). Sow seeds in spring after last frost. Succession plant throughout spring, summer, and fall for continuous harvest. Fertilize as needed. Optimum growing temperature is in the 60s°F (60–70°F). Exposure to frost or prolonged temperatures below 50°F may result in bolting. Mulch fall crops to avoid premature bolting.
Harvest: Fully harvestable at 40–45 days when about 4 inches tall. Harvest in the morning before the heat of the sun removes moisture from the leaves. Cut the short root stem below the base and lift away the head.
Watch for: Aphids, flea beetles, and cabbage moths (especially cabbage worms). Damping off can be a concern in poorly drained soil.
| Botanical Name | Brassica rapa chinensis |
| Type | Dwarf / Nai Pe Tsai type |
| Petiole Color | White, spoon-shaped |
| Leaf Color | Dark green, glossy |
| Flavor | Mild and sweet; milder than kale or mustard |
| Days to Maturity | 40–45 days |
| Days to Germination | 5–15 days |
| Harvest Height | ~4 inches tall |
| Plant Height | 3–4 inches |
| Plant Width | 12 inches |
| Seeding Depth | ¼–½ inch |
| Row Spacing | 12–18 inches |
| Spacing | 4 plants per sq ft |
| Soil pH | 6.0–6.8 |
| Soil | Well-draining, enriched |
| Temperature | 60–70°F optimum |
| Sun | Full sun to partial shade |
| Pests | Aphids, flea beetles, cabbage worms; damping off in wet soil |
| Type | Certified Organic, Heirloom, Open-Pollinated, Non-GMO, Annual |
| USDA Zones | 1–12 (year-round in sub-tropical) |
Packed and shipped by Box Garden Seeds LLC — heirloom seeds grown without GMOs, selected for flavor, resilience, and your garden’s success.