When should I plant Purple Kohlrabi in Zone 2a?

Start Purple Kohlrabi seeds indoors around Apr 3. Transplant outdoors after Apr 24. Expect first harvest around Jun 3.

What is the last frost date for Zone 2a?

The average last spring frost date for Zone 2a is May 15. The first fall frost averages Sep 15, giving a 123-day growing season.

Can I grow Purple Kohlrabi in Zone 2a?

Yes. Purple Kohlrabi needs 55 days to harvest. Zone 2a has a 123-day growing season, which is sufficient. You can plant up to 3 successions.

Growing Purple Kohlrabi in Zone 2a

Zone 2a has harsh winters and a short growing season. Start Purple Kohlrabi early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 15.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 3Sep 15

Season: May 15 – Sep 15 (123 days) · Succession: plant every 3 weeks (up to 3x)

Zone2a

Last FrostMay 15

First FrostSep 15

Season Length123 days

Days to Harvest55

SunFull Sun

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Purple Kohlrabi in Zone 2a

Start Seeds Indoors: Apr 3

Start Purple Kohlrabi seeds indoors around Apr 3 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 5–10 days.

Transplant Outdoors: Apr 24

Transplant Purple Kohlrabi seedlings outdoors after Apr 24. Wait until soil temperature reaches 45°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Jun 3

First harvest approximately Jun 3 (~40 days from transplant). Continue harvesting until first frost (Sep 15).

Fall Planting: Jul 21

For a fall harvest, plant Purple Kohlrabi around Jul 21 (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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