Vegetables · Cool
Celeriac
Apiaceae
At a glance
- Plant spacing
- 40 cm
- USDA zones
- 4a–9a
- Frost-sensitive
- no
- Growth duration
- 26 weeks
Which beds suit?
- Sun (prefers)
- full sunAlso okay:partial shade
- Soil (prefers)
- loamyAlso okay:clayraised-bed mix
- Drainage (prefers)
- normalAlso okay:heavy / waterlogged
Seed & start
Pre-culture recommended
Start indoors / cold frame first, transplant into the raised bed later.
Stachi's tip
Celeriac is a marathon runner — 6 months from planting to harvest. Wants moist, humus-rich soil. Harvest after the first light frost.
The plant's year: sowing, transplanting, harvest
Sowing
Transplanting
Harvest
Good neighbours
No fixed companion partners — easy to mix.
Limited evidence. This value is not backed by a specialist source — treat it as a pointer.
Avoid these neighbours
Limited evidence. This value is not backed by a specialist source — treat it as a pointer.
Good pre-cultures
Stachi has no specific pre-cultures recorded.
Sources
- LLM-Baseline+gpt-5-review
- LLM-Baseline-Intercrop
- LLM-Baseline-2026-05-09 yieldKg
- LLM-Baseline-2026-05-10 family-zehrer
- LLM-Baseline-2026-05-10 sun-soil-drainage
- Dreschflegel – Knollensellerie Hochdahler Markt (https://dreschflegel-saatgut.de/knollensellerie-hochdahler-markt)
- Sativa Rheinau – Knollensellerie (Kulturblatt) (https://www.sativa-rheinau.ch/hausgarten/tipps/kulturblaetter/knollensellerie.html)
- LWG Bayern Gartenblog – Sellerie pflanzen (20.06.2018) (https://www.lwg.bayern.de/gartenakademie/gartendokumente/gemueseblog/192612/index.php)
Where these figures come from
- Timing
- Horticulturally established — consistent across the cited standard works.
- Spacing
- Horticulturally established — consistent across the cited standard works.
- Companion planting
- Limited evidence. This value is not backed by a specialist source — treat it as a pointer.
- Crop rotation
- Limited evidence. This value is not backed by a specialist source — treat it as a pointer.
- Yield
- Limited evidence. This value is not backed by a specialist source — treat it as a pointer.
Sources: LLM-Baseline+gpt-5-review · LLM-Baseline-Intercrop · LLM-Baseline-2026-05-09 yieldKg · LLM-Baseline-2026-05-10 family-zehrer · LLM-Baseline-2026-05-10 sun-soil-drainage · Dreschflegel – Knollensellerie Hochdahler Markt (https://dreschflegel-saatgut.de/knollensellerie-hochdahler-markt) · Sativa Rheinau – Knollensellerie (Kulturblatt) (https://www.sativa-rheinau.ch/hausgarten/tipps/kulturblaetter/knollensellerie.html) · LWG Bayern Gartenblog – Sellerie pflanzen (20.06.2018) (https://www.lwg.bayern.de/gartenakademie/gartendokumente/gemueseblog/192612/index.php)
Articles about this plant
Storing carrots, beetroot, celeriac: how to keep them dry through winter
Last year Frau Schneider let her whole carrot harvest go mouldy in the cellar because she packed everything damp into a plastic bag. The sand-box method takes 10 minutes and keeps them good until March.
Celeriac: get it out of the ground before the first hard frost hits
With parsnips and carrots, the rule is: wait for frost. With celeriac, it's the opposite. Leave it in the ground too long and you risk soft, rotten spots on the bulb – here's what to watch for on timing.
Parsnips in the raised bed: wait a little longer – frost is what makes them great
If your parsnips are still in the ground in late September, don't pull them yet. Only once the first frost arrives does the starch turn to sugar – and an ordinary root vegetable becomes something genuinely excellent.
Products mentioned in this post
- Plantura organic tomato seed set (10 varieties)Open-pollinated, good germination — robust for raised beds.
- Organic tomato seed set, 14 varieties
- Organic heirloom tomato seed set (Demeter, 12 varieties)
- Organic vegetable seed set, 10 varietiesCucumber, tomato, beetroot, broccoli, carrot, chard & more.