Celeriac

Celeriac prefers fertile, moisture-retentive soil that drains well, with a pH around 6.0-7.0. Add compost and give modest nitrogen side-dressings through early growth, keeping moisture steady so the swollen stem base enlarges evenly.

Sun

Full sun

Water

Even moisture; about 1 in/week including rain

Spacing

12 in

First harvest

110–140 days

Tips

• Start seeds indoors 10-12 weeks before transplanting, surface-sowing or barely covering them in moist seed mix.
• Set hardened plants 12 inches apart after prolonged cold weather ends, keeping the crown at soil level.
• Water regularly and mulch between plants, leaving the developing swollen base uncovered.
• Remove small side shoots as they appear and watch for aphids and leaf spots while avoiding overhead irrigation.
• Lift when the swollen base reaches roughly 3-4 inches across, trimming off leaves and small roots.