Celeriac (Celery Root) in Zone 9a & 9b

Apium graveolens var. rapaceum

When to plant celeriac (celery root) in zone 9b

Zones 9a and 9b share the same average frost dates in our data, so this page covers both.

Method: Start indoors: Start indoors from seed, then transplant outside. Celeriac (Celery Root) needs a head start most zones can't give it by direct-sowing alone.

Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 1-1.5 ft.

Celeriac is celery bred in the other direction: same species, but the plant puts its effort into a swollen root instead of stalks. It comes out of the ground looking like a knot of pale roots wrapped round a cricket ball, and once you've peeled it, it tastes like celery that has calmed down. Grated raw into a remoulade or roasted in chunks, it earns its space.

How celeriac (celery root) fits zone 9's season

Zone 9b's frost-free window runs about 293 days, from February 15 to December 5. Celeriac (Celery Root) needs about 100 days from transplant to first harvest.

Good companions

No standout companions recorded yet for Celeriac (Celery Root).

Where to buy celeriac seeds

• Botanical Interests
• True Leaf Market
• Burpee
• High Mowing Organic Seeds

See why we recommend these suppliers →

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See it growing

Search YouTube for "growing celeriac (celery root)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)

← Back to the full zone 9b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →

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Growing Celeriac (Celery Root) in USDA zone 9b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.

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