Growing Guide
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Vegetable (Cool Season) - Parsley Family

Also known as root celery, knob celery
Apium graveolens var. Rapaceum
Umbelliferae Family

Celeriac is closely related to celery, but easier to grow. It is prized for its crisp, celery-flavored root, which you can eat raw or cooked. A staple in Europe, it is little known in North America.

Site Characteristics
  • full sun
  • part shade
Prefers full sun.

Soil conditions:

  • tolerates damp soil
Like celery, celeriac prefers rich soil, high in organic matter with pH 6.0 to 7.0, and plentiful, consistent moisture. But it will tolerate less-than-ideal conditions.
Plant Traits

Lifecycle: annual

Biennial grown as an annual.

Ease-of-care: moderately difficult

Foliage color:

  • medium green
  • dark green

Foliage texture: medium


  • cushion, mound or clump
  • upright
Special Considerations
  • frost - More frost-tolerant than celery.
Special characteristics:
  • not native to North America - Mediterranean origin.
Growing Information
How to plant:

Propagate by seed

Germination temperature: 70 F to 75 F - Optimum when starting indoors.

Days to emergence: 14 to 21

Maintenance and care:
Grow celeriac similar to celery. Start plants inside about 10 to 12 weeks before last frost. Plant several seeds per cell. Seeds need light to germinate, so don’t cover seed deeply. 50 percent germination is considered good for this crop.

Keep soil moist and warm (about 70 F to 75 F) until seeds germinate in 2 to 3 weeks. After germination, grow inside in a cool location (about 60 F to 70 F). Thin to one plant per cell.

Set out transplants closely spaced - just 6 to 8 inches apart, about 2 weeks before average last frost. Plants can withstand light to moderate frosts.

Mulch or hill soil over root shoulders to keep them covered.

In Zone 7 and warmer, can be planted in summer for winter and spring harvest.

Browse celeriac varieties at our Vegetable Varieties for Gardeners website.

Look for different sized roots and days to harvest, usually 110 to 130 days. Several heirloom varieties are available, though many seed catalogs just list the generic species.