Growing Kohlrabi in Zone 6b
Zone 6b has mild winters and a long growing season — good conditions for Kohlrabi. Last frost: Apr 15. First frost: Oct 22.
Planting Calendar
Season: Apr 15 – Oct 22 (190 days) · Succession: plant every 3 weeks (up to 6x)
When to Plant Kohlrabi in Zone 6b
Start Seeds Indoors: Mar 4
Start Kohlrabi seeds indoors around Mar 4 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 5–10 days.
Transplant Outdoors: Mar 25
Transplant Kohlrabi seedlings outdoors after Mar 25. Wait until soil temperature reaches 45°F. Space plants at 6/sqft. Harden off plants for a week before moving outside.
Harvest: May 4
First harvest approximately May 4 (~40 days from transplant). Continue harvesting until first frost (Oct 22).
Fall Planting: Aug 27
For a fall harvest, plant Kohlrabi around Aug 27 (8 weeks before first frost).
Kohlrabi 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 Kohlrabi in Zone 6b?
Start Kohlrabi seeds indoors around Mar 4. Transplant outdoors after Mar 25. Expect first harvest around May 4.
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 Kohlrabi in Zone 6b?
Yes. Kohlrabi needs 55 days to harvest. Zone 6b has a 190-day growing season, which is sufficient. You can plant up to 6 successions.
What is the best month to plant Kohlrabi in Zone 6b?
The best time to start Kohlrabi 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 Kohlrabi take to harvest?
Kohlrabi takes approximately 55 days from planting to harvest. In Zone 6b, expect your first harvest around May 4.
Plan Your Kohlrabi Garden
Track Kohlrabi from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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