Kohlrabi illustration

Kohlrabi Growing Guide

Brassicaceae family

Days to Harvest55 days
SunlightFull Sun
Frost ToleranceModerate
Spacing6/sqft
Germination5-10 days
HardinessHardy
Germ. Temp65°F
Start Indoors6 weeks before last frost

Growth Stages

  1. Seedling
  2. Early Vegetative
  3. Late Vegetative / Harvest Ready

Planting Dates by Zone

Zone 1aZone 1bZone 2aZone 2bZone 3aZone 3bZone 4aZone 4bZone 5aZone 5bZone 6aZone 6bZone 7aZone 7bZone 8aZone 8bZone 9aZone 9bZone 10aZone 10bZone 11aZone 11bZone 12aZone 12bZone 13aZone 13b

Frequently Asked Questions

How long does it take to grow Kohlrabi?

Kohlrabi takes approximately 55 days from planting to harvest.

How much sun does Kohlrabi need?

Kohlrabi requires full sun (6+ hours direct sunlight per day).

How far apart should I plant Kohlrabi?

Plant Kohlrabi at 6/sqft using square foot gardening spacing.

Can Kohlrabi survive frost?

Kohlrabi is tolerant of moderate frost.

How long does Kohlrabi take to germinate?

Kohlrabi seeds germinate in 5-10 days at an optimal temperature of 65°F.

When should I start Kohlrabi seeds indoors?

Start Kohlrabi seeds indoors 6 weeks before your last frost date, then transplant -3 weeks after last frost.

Plan Your Kohlrabi Garden

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

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