Growing Napa Cabbage in Zone 6b
Zone 6b has mild winters and a long growing season — good conditions for Napa Cabbage. Last frost: Apr 15. First frost: Oct 22.
Planting Calendar
Season: Apr 15 – Oct 22 (190 days)
When to Plant Napa Cabbage in Zone 6b
Start Seeds Indoors: Mar 4
Start Napa Cabbage seeds indoors around Mar 4 (6 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 5–10 days.
Transplant Outdoors: Mar 25
Transplant Napa Cabbage seedlings outdoors after Mar 25. Wait until soil temperature reaches 45°F. Space plants at 12/sqft. Harden off plants for a week before moving outside.
Harvest: May 29
First harvest approximately May 29 (~65 days from transplant). Continue harvesting until first frost (Oct 22).
Fall Planting: Jul 30
For a fall harvest, plant Napa Cabbage around Jul 30 (12 weeks before first frost).
Napa Cabbage in Other Zones
1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13bFrequently Asked Questions
When should I plant Napa Cabbage in Zone 6b?
Start Napa Cabbage seeds indoors around Mar 4. Transplant outdoors after Mar 25. Expect first harvest around May 29.
What is the last frost date for Zone 6b?
The average last spring frost date for Zone 6b is Apr 15. The first fall frost averages Oct 22, giving a 190-day growing season.
Can I grow Napa Cabbage in Zone 6b?
Yes. Napa Cabbage needs 70 days to harvest. Zone 6b has a 190-day growing season, which is sufficient.
What is the best month to plant Napa Cabbage in Zone 6b?
The best time to start Napa Cabbage in Zone 6b is Mar. Begin seeds indoors around Mar 4, then transplant outdoors after the last frost date of Apr 15.
How long does Napa Cabbage take to harvest?
Napa Cabbage takes approximately 70 days from planting to harvest. In Zone 6b, expect your first harvest around May 29.
Plan Your Napa Cabbage Garden
Track Napa Cabbage from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
Start Free Napa Cabbage Growing Guide