Giant Prague Celeriac on a white background.
Several whole and cut heads of Giant Prague Celeriac with a salt shaker and knife on wooden cutting board.
A close-up of whole and cut Giant Prague Celeriac heads on a wooden cutting board.
A single head of Giant Prague Celeriac on a white marble countertop.
Overhead view of Giant Prague Celeriac heads on a wooden cutting board with a knife and salt shaker.
A pile of Giant Prague Celeriac roots on a blue cloth.
Giant Prague Celeriac on a white background.
Several whole and cut heads of Giant Prague Celeriac with a salt shaker and knife on wooden cutting board.
A close-up of whole and cut Giant Prague Celeriac heads on a wooden cutting board.
A single head of Giant Prague Celeriac on a white marble countertop.
Overhead view of Giant Prague Celeriac heads on a wooden cutting board with a knife and salt shaker.
A pile of Giant Prague Celeriac roots on a blue cloth.

Celeriac Seeds,
Giant Prague

3.810 ReviewsSKU: #CE103Min. seed count: 200
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Description

(Apium graveolens) The large white roots of this celery variety are superb fried or in soups. Its taste and texture are much like regular celery. Introduced in 1871, it is popular in parts of Europe.

Growing Tips: Celeriac thrives in rich, well-drained soil with plenty of organic matter. It prefers full sun but can tolerate some shade, especially in warmer climates. Sprouts form in 15-20 days, and the plant matures in about 110 days.

Plant Details

Botanical Name
Apium graveolens
Life Cycle
Biennial
Sun Requirement
6–8 hr.
Days to Germinate
15–20
Days to Maturity
110
Planting Depth
¼ in.
Plant Spacing
18 in.
Ideal Temperature
60–70°F
Frost Hardy
Yes

When to Grow

Celeriac is best started indoors in early spring and transplanted outdoors after the danger of frost has passed. In regions with mild winters, it can also be grown from fall through winter​​. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

How to Sow and Plant

Sow seeds about 1/4 inch deep in seed trays. Lightly cover them with soil or vermiculite, as light aids germination. Keep the soil moist and warm, around 70-75 F, until seeds sprout​. If starting indoors, thin seedlings to one plant per cell and continue growing them indoors until the weather stabilizes, several weeks after the last frost date. Once they have developed two sets of true leaves, transplant them outdoors , spacing them 18 inches apart in rows 18-24 inches apart​​.

How to Grow

Keep the soil consistently moist but not waterlogged. Regular watering is crucial, especially as the roots begin to swell. Celeriac is a heavy feeder. Enrich the soil with compost and consider side-dressing with compost or a balanced fertilizer every few weeks. Homemade liquid fertilizers from comfrey or stinging nettle can be beneficial​. Apply a thick layer of mulch to retain soil moisture, suppress weeds, and help blanch the swollen roots of the celeriac plants​.

How to Save Seeds

  • Celery and celeriac are insect pollinated and should be isolated by 1 mile from each other to ensure seed purity.
  • Both plants are biennial and must either be dug and stored or be left in the ground to overwinter and flower the following spring.
  • Harvest the seeds once the flowers have completely dried on the plant.
  • When stored properly, celery and celeriac seeds will last for 5 years or more.

FAQ

What are common pests and diseases for Giant Prague celeriac?

Celeriac has few serious pest or disease problems. Regular care and maintaining good soil health can prevent most issues.

When is Giant Prague celeriac ready to harvest?

Harvest celeriac when the root is 3-4 inches in diameter or slightly larger. It's best to harvest before the first hard freeze. The roots can be stored in the refrigerator for up to a week or in a cold, moist place for 2-3 months.

Can I grow Giant Prague celeriac in containers?

While it is possible, celeriac is not particularly well-suited for container gardening due to its long growing season and substantial nutrient needs.

Browse our full range of celery and celeriac seeds.
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