Kohlrabi Growing Guide
Kohlrabi is a great next step in your growing journey. Follow this guide from planting to harvest and you'll do great.
At a Glance
Difficulty
Moderate
Category
Vegetable
Sun Exposure
Full Sun, Partial Sun
Frost Tolerance
Frost Hardy
Growing Zones
Zones 3, 4, 5, 6, 7, 8, 9
Plant Family
Brassicaceae
Growing Season
Cool Season
Plant Lifecycle
Biennial
Also grows well as
When To Start
First Chance to Plant
45 Days Before Last Frost
Last Chance to Plant
60 Days Before First Frost
When should you plant Kohlrabi?
Your planting dates depend on where you live. Sign up to unlock dates personalized to your location.
Your Kohlrabi Planting Window
Start planting
May 15, 2026
Last chance
Sep 10, 2026
The Journey Ahead
Kohlrabi's Lifecycle
Seedling
Mature Plant
Seed Production
Step 2
Planting & Sprouting
Expect sprouts in 5–10 days
Growing Tips
- 1Kohlrabi thrives in full sun, so choose a spot that gets at least 6 hours of sunlight daily.
- 2Keep the soil consistently moist but not waterlogged, watering deeply once a week.
- 3Use well-draining, fertile soil with a pH of 6.0 to 7.5, and space plants about 12 inches apart to allow for proper growth.
- 4To manage pests, use row covers to protect young plants from cabbage worms and aphids.
Seedling Phase
Step 3
Growth & Maturity
~55
Days to Maturity
30 cm
Mature Height
30 cm
Mature Width
Pests to Watch For
Diseases to Watch For
Mature Plant
Step 4
Harvesting
Harvest Window
30 days
When to Pick
Harvest swollen stems when firm
How to Harvest
- 1Harvest kohlrabi when the bulb is 2-3 inches in diameter and firm.
- 2Use a sharp knife to cut the stem about an inch above the soil, avoiding damage to the leaves.
- 3Leave the roots in the ground to decompose naturally.
Step 5
Saving Seeds
How to Save Seeds
Saving seeds from your kohlrabi plant is a rewarding and simple process that any new grower can master! Allow a few healthy kohlrabi plants to grow past harvest time until they flower and produce seed pods. Once the pods turn brown and dry on the plant, gently cut them off and place them in a paper bag to finish drying. After a week or so, crush the pods to release the seeds, then separate out any plant debris. Store your seeds in a cool, dry place in a labeled envelope or jar, and they’ll be ready for planting next season—just remember, saving your own seeds means you’re one step closer to a self-sustaining garden!
Seed Production
Feeling inspired?
Grow Kohlrabi from seed.
The vegetable that looks like an alien spaceship. Buy a pack and get started.
$2.25
CAD
In Stock
