When should I plant Purple Kohlrabi in Zone 11a?

Start Purple Kohlrabi seeds indoors around Dec 17. Transplant outdoors after Jan 7. Expect first harvest around Feb 16.

What is the last frost date for Zone 11a?

The average last spring frost date for Zone 11a is Jan 28. The first fall frost averages Dec 22, giving a 328-day growing season.

Can I grow Purple Kohlrabi in Zone 11a?

Yes. Purple Kohlrabi needs 55 days to harvest. Zone 11a has a 328-day growing season, which is sufficient. You can plant up to 13 successions.

Growing Purple Kohlrabi in Zone 11a

Zone 11a has a year-round growing season. Purple Kohlrabi can be planted almost any time with proper planning. Last frost: Jan 28. First frost: Dec 22.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 17Dec 22

Season: Jan 28 – Dec 22 (328 days) · Succession: plant every 3 weeks (up to 13x)

Zone11a

Last FrostJan 28

First FrostDec 22

Season Length328 days

Days to Harvest55

SunFull Sun

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Purple Kohlrabi in Zone 11a

Start Seeds Indoors: Dec 17

Start Purple Kohlrabi seeds indoors around Dec 17 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 5–10 days.

Transplant Outdoors: Jan 7

Transplant Purple Kohlrabi seedlings outdoors after Jan 7. Wait until soil temperature reaches 45°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Feb 16

First harvest approximately Feb 16 (~40 days from transplant). Continue harvesting until first frost (Dec 22).

Fall Planting: Oct 27

For a fall harvest, plant Purple Kohlrabi around Oct 27 (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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