Out of season right now. The next sowing window opens in May.
Growing Calendar
This month: Jul
Plan ahead for this crop
- •Check growing conditions
- •Prepare for next stage
Watch Out For
Celery leaf miner tunnels pale blotches into leaves. Remove and destroy affected leaves as soon as you see them, and cover young plants with fine mesh
Slugs shred young seedlings and transplants. Protect with copper tape, beer traps or torchlit evening patrols until plants are established
Roots stay small if the soil dries out at any point in summer. Mulch thickly after planting and water deeply during dry spells
Grown Organically
Every method in this guide works with natural systems — no synthetic chemicals, no shortcuts.
Read our approachCommon Questions
About growing Celeriac in the UK
Why is my celeriac not swelling into a proper root?
Small or absent roots are almost always down to a dry spell at some point in the season, or plants started too late to build up size before autumn. Sow by mid-March, keep watering consistent all summer, and mulch to hold moisture in.
Is celeriac hard to grow from seed?
Yes, it's one of the trickier vegetables to start. Seeds are tiny, need light and warmth to germinate, and can take up to three weeks to show. A heated propagator and patience make the biggest difference.
When should I harvest celeriac?
From October onwards, once roots reach a reasonable size, usually tennis-ball size or larger. It's very hardy and can be left in the ground and lifted as needed right through to March.
Can I use celeriac leaves?
Yes, the leaves taste similar to celery and can be used sparingly to flavour stocks and soups, much like celery leaf, though the flavour is stronger.
Member guides
There's more to growing Celeriac than this guide covers.
A Garden Journal to log what worked, a personalised sowing planner in My Garden, and monthly reminders timed to the calendar.
