Growing Kohlrabi in Zone 12a

Zone 12a has a year-round growing season. Kohlrabi can be planted almost any time with proper planning. Last frost: Jan 1. First frost: Dec 31.

Planting Calendar

Indoor

Outdoor

Harvest

Nov 20Dec 31

Season: Jan 1 – Dec 31 (364 days) · Succession: plant every 3 weeks (up to 14x)

Zone12a

Last FrostJan 1

First FrostDec 31

Season Length364 days

Days to Harvest55

SunFull Sun

Frost ToleranceModerate

Spacing6/sqft

When to Plant Kohlrabi in Zone 12a

Start Seeds Indoors: Nov 20

Start Kohlrabi seeds indoors around Nov 20 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 5–10 days.

Transplant Outdoors: Dec 11

Transplant Kohlrabi seedlings outdoors after Dec 11. Wait until soil temperature reaches 45°F. Space plants at 6/sqft. Harden off plants for a week before moving outside.

Harvest: Jan 20

First harvest approximately Jan 20 (~40 days from transplant). Continue harvesting until first frost (Dec 31).

Fall Planting: Nov 5

For a fall harvest, plant Kohlrabi around Nov 5 (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 12a?

Start Kohlrabi seeds indoors around Nov 20. Transplant outdoors after Dec 11. Expect first harvest around Jan 20.

What is the last frost date for Zone 12a?

The average last spring frost date for Zone 12a is Jan 1. The first fall frost averages Dec 31, giving a 364-day growing season.

Can I grow Kohlrabi in Zone 12a?

Yes. Kohlrabi needs 55 days to harvest. Zone 12a has a 364-day growing season, which is sufficient. You can plant up to 14 successions.

What is the best month to plant Kohlrabi in Zone 12a?

The best time to start Kohlrabi in Zone 12a is Nov. Begin seeds indoors around Nov 20, then transplant outdoors after the last frost date of Jan 1.

How long does Kohlrabi take to harvest?

Kohlrabi takes approximately 55 days from planting to harvest. In Zone 12a, expect your first harvest around Jan 20.

Plan Your Kohlrabi Garden

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

Start Free Kohlrabi Growing Guide