Celeriac Growing Guide
Celeriac 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
Frost Tolerance
Frost Hardy
Cold Hardiness
Survives to -7°C
Plant Family
Apiaceae
Growing Season
Cool Season
Plant Lifecycle
Biennial
Also grows well as
How to Start It
★ Recommended for beginners
Surface-sow indoors 10 weeks before last frost (the seed needs light), keep warm and moist, then harden off and transplant after frost, 25 cm apart. Don't bury the crown.
Celeriac is the knobbly swollen-stem cousin of celery, grown for its nutty root. It's slow (about 110 days) and needs rich, constantly moist soil — the main reasons it's rated moderate rather than easy.
When To Start
First Chance to Plant
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Last Chance to Plant
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When should you plant Celeriac?
Your planting dates depend on your local climate. Sign up and add your location to unlock personalized dates.
Your Celeriac Planting Window
Start planting
May 15, 2026
Last chance
Sep 10, 2026
The Journey Ahead
Celeriac's Lifecycle
Seedling
Mature Plant
Seed Production
Step 2
Planting & Sprouting
Expect sprouts in 14–21 days
Growing Tips
- 1Celeriac's two demands are a long season and never drying out — rich soil, constant moisture, and mulch.
- 2Removing some outer leaves and side-roots through summer helps the bulb swell.
Seedling Phase
Step 3
Growth & Maturity
~110
Days to Maturity
40 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
Lift in autumn once the bulbs are tennis-ball-sized or larger
How to Harvest
- 1Lift the swollen bases in autumn once they're at least tennis-ball size — they tolerate light frost.
- 2Trim the roots and tops; they store for months in a cool, humid place.
Step 5
Saving Seeds
How to Save Seeds
Biennial — overwinter a root, let it flower and seed the next year, and collect the tiny seed from the umbels.
Seed Production
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