Bok Choy Seeds
When should I plant
Bok choy is a cool-season crop that thrives in spring and fall, as it tends to bolt (flower prematurely) in hot, dry weather.
For a spring harvest, sow seeds indoors about 4 weeks before the last expected spring frost.
For a fall crop, directly sow seeds in late summer at least 50 days before the first estimated fall frost date.
Site consideration
Bok choy prefers fertile, well-drained soil rich in organic matter, with a pH of 6.0–7.5.
Choose a location with full sun to partial shade. In warmer climates, partial shade during the hottest part of the day helps prevent bolting.
Before planting, loosen soil 8–10 inches deep and mix in compost or aged organic matter to improve fertility and structure.
Water
Keep soil consistently moist but not waterlogged. Bok choy grows rapidly and requires regular watering to maintain tender leaves and stems.
Aim for approximately 1 inch of water per week, ideally applied in the morning to ensure moisture during the hottest part of the day.
Sunlight
Bok choy thrives in full sun (at least 6 hours/day) but benefits from partial shade in warmer climates to prevent premature flowering and maintain leaf tenderness.
Seed Germination
Bok choy seeds typically germinate in 8–12 days when soil temperatures range between 55–70°F. Sow seeds about ¼–½ inch deep and keep the soil evenly moist until seedlings emerge.
Transplant
If using transplants, harden off seedlings before planting outdoors. Transplant once seedlings have a set of true leaves and soil temperatures reach at least 55°F.
Plant at the same depth as they were in their container, water thoroughly, and protect from unexpected cold snaps.
Other Elements
Fertilization
Fertilize bok choy by amending soil with compost at planting, then applying a balanced (e.g., 10-10-10) or nitrogen-rich liquid fertilizer every 10–15 days. As heavy feeders, bok choy plants require consistent nutrients for rapid growth. Use organic options like fish emulsion or compost tea for best results, especially in containers.
Weed control
Keep the planting area free of weeds, especially while plants are young. Apply organic mulch such as straw or shredded leaves to conserve moisture and suppress weeds. Shallow cultivation can also help manage weeds without disturbing the plant roots.
Harvest
Baby leaves can be harvested in as little as 30 days—snip individual outer leaves and allow the plant to continue producing. For semi-mature or full-sized heads, harvest in 45 to 75 days, when plants are firm, compact. Cut the entire plant at soil level with a sharp knife. Harvest in early morning for the best flavor and crispness.
Seed Storage
The seeds will maintain a high germination percentage if stored under proper conditions. How long your seeds remain viable will depend on the temperature and moisture levels the seeds are exposed to. Seeds which are improperly stored will quickly deteriorate if unprotected against high humidity and dramatic temperature fluctuations day after day.
For best results, keep the seed in our moisture-proof ziplock sealing bags, which provide a better moisture prevention effect. Glass jar or plastic containers with snap-on lids works well too, add a packet of desiccant before sealing into the seed, such as silica gel to remove any moisture remains in the storage container. Seed stored under these conditions will remain viable for as long as years.
Factors Which commonly Cause Poor Results
1. Improper drainage soil
2. Sowing depth more than one inch
3. Covering the seed too deep beneath the soil surface
4. Cover a large area with a small amount of seed.
5. Plant at a wrong time of a year
6. Lack of sunlight
7. Inadequate rainfall after seed germination. The area should not be allowed to become completely dry. Supplemental watering may be required to sustain plant life.
8. Extreme weather conditions: hail, drought, excessive rainfall, floods, unseasonably cold temperatures.