When should I plant Purple Kohlrabi in Zone 8b?

Start Purple Kohlrabi seeds indoors around Feb 8. Transplant outdoors after Mar 1. Expect first harvest around Apr 10.

What is the last frost date for Zone 8b?

The average last spring frost date for Zone 8b is Mar 22. The first fall frost averages Nov 10, giving a 233-day growing season.

Can I grow Purple Kohlrabi in Zone 8b?

Yes. Purple Kohlrabi needs 55 days to harvest. Zone 8b has a 233-day growing season, which is sufficient. You can plant up to 8 successions.

Growing Purple Kohlrabi in Zone 8b

Zone 8b has warm winters and an extended growing season — excellent for heat-loving crops like Purple Kohlrabi. Last frost: Mar 22. First frost: Nov 10.

Planting Calendar

Indoor

Outdoor

Harvest

Feb 8Nov 10

Season: Mar 22 – Nov 10 (233 days) · Succession: plant every 3 weeks (up to 8x)

Zone8b

Last FrostMar 22

First FrostNov 10

Season Length233 days

Days to Harvest55

SunFull Sun

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Purple Kohlrabi in Zone 8b

Start Seeds Indoors: Feb 8

Start Purple Kohlrabi seeds indoors around Feb 8 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 5–10 days.

Transplant Outdoors: Mar 1

Transplant Purple Kohlrabi seedlings outdoors after Mar 1. 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 10

First harvest approximately Apr 10 (~40 days from transplant). Continue harvesting until first frost (Nov 10).

Fall Planting: Sep 15

For a fall harvest, plant Purple Kohlrabi around Sep 15 (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 13b

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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