When should I plant Purple Kohlrabi in Zone 11b?

Start Purple Kohlrabi seeds indoors around Dec 4. Transplant outdoors after Dec 25. Expect first harvest around Feb 3.

What is the last frost date for Zone 11b?

The average last spring frost date for Zone 11b is Jan 15. The first fall frost averages Dec 31, giving a 350-day growing season.

Can I grow Purple Kohlrabi in Zone 11b?

Yes. Purple Kohlrabi needs 55 days to harvest. Zone 11b has a 350-day growing season, which is sufficient. You can plant up to 14 successions.

Growing Purple Kohlrabi in Zone 11b

Zone 11b has a year-round growing season. Purple Kohlrabi can be planted almost any time with proper planning. Last frost: Jan 15. First frost: Dec 31.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 4Dec 31

Season: Jan 15 – Dec 31 (350 days) · Succession: plant every 3 weeks (up to 14x)

Zone11b

Last FrostJan 15

First FrostDec 31

Season Length350 days

Days to Harvest55

SunFull Sun

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Purple Kohlrabi in Zone 11b

Start Seeds Indoors: Dec 4

Start Purple Kohlrabi seeds indoors around Dec 4 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 5–10 days.

Transplant Outdoors: Dec 25

Transplant Purple Kohlrabi seedlings outdoors after Dec 25. 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 3

First harvest approximately Feb 3 (~40 days from transplant). Continue harvesting until first frost (Dec 31).

Fall Planting: Nov 5

For a fall harvest, plant Purple Kohlrabi around Nov 5 (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.

Start Free Purple Kohlrabi Growing Guide