Growing Chinese Broccoli in Zone 3b
Zone 3b has harsh winters and a short growing season. Start Chinese Broccoli early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 22.
Planting Calendar
Season: May 15 – Sep 22 (130 days)
When to Plant Chinese Broccoli in Zone 3b
Start Seeds Indoors: Apr 3
Start Chinese Broccoli seeds indoors around Apr 3 (6 weeks before last frost). Optimal germination temperature: 75°F. Germinates in 5–10 days.
Transplant Outdoors: May 29
Transplant Chinese Broccoli seedlings outdoors after May 29. Wait until soil temperature reaches 50°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.
Harvest: Jul 28
First harvest approximately Jul 28 (~60 days from transplant). Continue harvesting until first frost (Sep 22).
Fall Planting: Jun 30
For a fall harvest, plant Chinese Broccoli around Jun 30 (12 weeks before first frost).
Chinese Broccoli 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 Chinese Broccoli in Zone 3b?
Start Chinese Broccoli seeds indoors around Apr 3. Transplant outdoors after May 29. Expect first harvest around Jul 28.
What is the last frost date for Zone 3b?
The average last spring frost date for Zone 3b is May 15. The first fall frost averages Sep 22, giving a 130-day growing season.
Can I grow Chinese Broccoli in Zone 3b?
Yes. Chinese Broccoli needs 60 days to harvest. Zone 3b has a 130-day growing season, which is sufficient.
What is the best month to plant Chinese Broccoli in Zone 3b?
The best time to start Chinese Broccoli in Zone 3b is Apr. Begin seeds indoors around Apr 3, then transplant outdoors after the last frost date of May 15.
How long does Chinese Broccoli take to harvest?
Chinese Broccoli takes approximately 60 days from planting to harvest. In Zone 3b, expect your first harvest around Jul 28.
Plan Your Chinese Broccoli Garden
Track Chinese Broccoli from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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