Growing Kohlrabi in Zone 10a

Zone 10a has a year-round growing season. Kohlrabi can be planted almost any time with proper planning. Last frost: Feb 20. First frost: Dec 1.

Planting Calendar

Indoor

Outdoor

Harvest

Jan 9Dec 1

Season: Feb 20 – Dec 1 (284 days) · Succession: plant every 3 weeks (up to 10x)

Zone10a

Last FrostFeb 20

First FrostDec 1

Season Length284 days

Days to Harvest55

SunFull Sun

Frost ToleranceModerate

Spacing6/sqft

When to Plant Kohlrabi in Zone 10a

Start Seeds Indoors: Jan 9

Start Kohlrabi seeds indoors around Jan 9 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 5–10 days.

Transplant Outdoors: Jan 30

Transplant Kohlrabi seedlings outdoors after Jan 30. Wait until soil temperature reaches 45°F. Space plants at 6/sqft. Harden off plants for a week before moving outside.

Harvest: Mar 11

First harvest approximately Mar 11 (~40 days from transplant). Continue harvesting until first frost (Dec 1).

Fall Planting: Oct 6

For a fall harvest, plant Kohlrabi around Oct 6 (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 13b

Frequently Asked Questions

When should I plant Kohlrabi in Zone 10a?

Start Kohlrabi seeds indoors around Jan 9. Transplant outdoors after Jan 30. Expect first harvest around Mar 11.

What is the last frost date for Zone 10a?

The average last spring frost date for Zone 10a is Feb 20. The first fall frost averages Dec 1, giving a 284-day growing season.

Can I grow Kohlrabi in Zone 10a?

Yes. Kohlrabi needs 55 days to harvest. Zone 10a has a 284-day growing season, which is sufficient. You can plant up to 10 successions.

What is the best month to plant Kohlrabi in Zone 10a?

The best time to start Kohlrabi in Zone 10a is Jan. Begin seeds indoors around Jan 9, then transplant outdoors after the last frost date of Feb 20.

How long does Kohlrabi take to harvest?

Kohlrabi takes approximately 55 days from planting to harvest. In Zone 10a, expect your first harvest around Mar 11.

Plan Your Kohlrabi Garden

Track Kohlrabi from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

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