Growing Purple Kohlrabi in Zone 7b
Zone 7b has mild winters and a long growing season — good conditions for Purple Kohlrabi. Last frost: Apr 10. First frost: Nov 7.
Planting Calendar
Season: Apr 10 – Nov 7 (211 days) · Succession: plant every 3 weeks (up to 7x)
When to Plant Purple Kohlrabi in Zone 7b
Start Seeds Indoors: Feb 27
Start Purple Kohlrabi seeds indoors around Feb 27 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 5–10 days.
Transplant Outdoors: Mar 20
Transplant Purple Kohlrabi seedlings outdoors after Mar 20. Wait until soil temperature reaches 45°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.
Harvest: Apr 29
First harvest approximately Apr 29 (~40 days from transplant). Continue harvesting until first frost (Nov 7).
Fall Planting: Sep 12
For a fall harvest, plant Purple Kohlrabi around Sep 12 (8 weeks before first frost).
Purple 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 Purple Kohlrabi in Zone 7b?
Start Purple Kohlrabi seeds indoors around Feb 27. Transplant outdoors after Mar 20. Expect first harvest around Apr 29.
What is the last frost date for Zone 7b?
The average last spring frost date for Zone 7b is Apr 10. The first fall frost averages Nov 7, giving a 211-day growing season.
Can I grow Purple Kohlrabi in Zone 7b?
Yes. Purple Kohlrabi needs 55 days to harvest. Zone 7b has a 211-day growing season, which is sufficient. You can plant up to 7 successions.
What is the best month to plant Purple Kohlrabi in Zone 7b?
The best time to start Purple Kohlrabi in Zone 7b is Feb. Begin seeds indoors around Feb 27, then transplant outdoors after the last frost date of Apr 10.
How long does Purple Kohlrabi take to harvest?
Purple Kohlrabi takes approximately 55 days from planting to harvest. In Zone 7b, expect your first harvest around Apr 29.
Plan Your Purple Kohlrabi Garden
Track Purple Kohlrabi from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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