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Bok Choy Seeds, Shanghai Green
Description
(Brassica rapa subsp. chinensis). A delicious jade green baby type that is in high demand with top chefs. The small plants are upright and have light green stems. Equally suited for home gardens and farming, the plants’ unique curvature and chartreuse petioles make Shanghai Green bok choy stand out at market. They are extra tender and finely flavored, making them a coveted variety among culinarians in the know.
- 35-55 days to maturity
- 4-6 hours of sun
- Sprouts in 10-14 days
- Ideal Temperature: 60-80 F
- Seed Depth: 1/4"
- Plant Spacing: 1-2"; thin to 12”
- Frost Hardy: No
Growing Tips, Tricks and FAQs
Growing Tips
Shanghai Green thrives in well-drained, fertile soil enriched with organic matter such as compost. Consistent watering is essential, as the plant prefers moist but not waterlogged soil. Mulching around the plants can help retain moisture and keep the roots cool.
When to Grow
Shanghai Green bok choy is best planted in the cool seasons of spring and fall. For spring planting, start seeds indoors 4-6 weeks before the last frost date and transplant them outdoors when the risk of frost has passed. For a fall crop, sow seeds directly in late summer when temperatures begin to drop. This variety can tolerate light frosts, but it is prone to bolting if temperatures are too warm.
How to Sow and Plant
Sow seeds 1/4 inch deep in the soil, spacing them about 1-2 inches apart. Once seedlings are established, thin them to about 12 inches apart to give the plants room to grow. Shanghai Green can be grown in rows spaced 18-24 inches apart, or in containers with good drainage. Consistent moisture is key to preventing bolting, so water regularly.
How to Grow
This variety requires full sun to partial shade, especially in the warmer months to prevent overheating. It grows best in temperatures between 60-80 F. Fertilize with a balanced organic fertilizer or compost at planting time. Pests like cabbage worms and aphids can be a problem, so consider using row covers or organic insect controls.
How to Save
Bok choy is an annual, completing its life cycle in one year. To avoid selecting bolt-prone plants, don't save seeds from prematurely bolted ones. Let plants mature fully, harvest the dried pods, crumble the small round seeds into a jar or bag, then seal and store the seeds in a cool, dark, dry place. Bok choy cross-pollinates with other rapa species but not with different species of Brassica, so it's safe to grow it next to mustard greens (Brassica juncea), for example. To ensure seed purity, isolate your bok choy from other blooming B. rapa by about a half mile or use caging techniques. Allow your healthiest plants to flower for a strong, diverse seed pool.
FAQ
Can Shanghai Green be grown in containers?
Yes, this variety is well-suited for container gardening. Choose a container that is at least 6 inches deep and has good drainage. Use a potting mix enriched with compost, and place the container in a location that receives 4-6 hours of sunlight daily.
How do I prevent Shanghai Green bok choy from bolting?
Bolting occurs when bok choy sends up a flower stalk prematurely, often due to temperature fluctuations or stress. To prevent this, ensure you plant the bok choy during cooler months, maintain consistent soil moisture, and provide partial shade in warmer climates. Mulching can also help regulate soil temperature.
What are common pests for Shanghai Green bok choy, and how can I manage them?
Common pests include cabbage worms, aphids, and flea beetles. To manage these pests, consider using row covers to protect young plants, manually remove pests when spotted, and use organic insecticides like neem oil if necessary. Companion planting with herbs like mint or thyme can also help deter pests.
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