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Celeriac Seeds, Giant Prague
Description
(Apium graveolens) This root celery variety is grown for its large, white roots that are superb fried or in soup. Its taste and texture are much like regular celery. Giant Prague celeriac was introduced in 1871 and is popular in many parts of Europe.
Growing Tips, Tricks and FAQs
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.
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​​. For specific frost dates in your area, consult a local agricultural extension service or use an online freeze date calculator.
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
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​.
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