- Hardiness Zone: 3-11 Biennial Often Grown As An Annual
Seed Depth: 1/8–1/4 inch
Seed Spacing: 6–8 inches
Row Spacing: 18–24 inches
Sunlight: Full sun to partial shade
Days to Sprout: 14–21 days
Days to Maturity: 110–120 days
Growth Habit: Upright, root-forming biennial grown as an annual
Sunlight: Thrives in full sun but tolerates partial shade, especially in warmer climates.
Soil Type: Prefers rich, well-drained soil with a pH of 6.0–7.5. Enrich soil with compost or organic matter for better growth.
When to Plant: Start seeds indoors 10–12 weeks before the last frost. Transplant outdoors when seedlings are 4–6 inches tall and temperatures stay above 50°F.
Direct Sowing: Not recommended due to the long growing season.
Indoor Sowing: Sow seeds 1/8–1/4 inch deep in trays or pots. Thin seedlings to the strongest ones before transplanting.
Succession Planting: Not typically needed; celeriac is a long-season crop.
Watering: Keep the soil consistently moist but not waterlogged. Mulch around plants to retain moisture and regulate soil temperature.
Fertilizing: Apply a balanced fertilizer at planting and again mid-season to support steady growth.
Pruning: Trim yellowing or damaged leaves to maintain plant health and redirect energy to root development.
Pest and Disease Control: Watch for aphids, slugs, and fungal diseases. Use organic pest control methods and maintain proper spacing for airflow.
When to Harvest: Harvest roots when they are 3–4 inches in diameter, typically 110–120 days after planting.
How to Harvest: Loosen the soil around the base with a garden fork and gently lift the roots.
Seed Collection: Allow plants to bolt in their second year to produce seeds. Collect seeds from dried flower heads.
Storing Seeds: Store seeds in an airtight container in a cool, dry place.
Why You’ll Love It
Giant Prague Celeriac is an old-world heirloom grown for its flavorful root, which offers a mild celery-like taste with nutty, earthy undertones. Though not grown for its stalks like regular celery, this variety forms large, rounded roots with smooth, creamy flesh perfect for fall and winter meals. It thrives in cooler weather and stores well after harvest, making it a great option for gardeners who want something deliciously different and deeply satisfying.
Plant Characteristics
Height: 12–18 inches
Growth Habit: Upright greens with a swollen, round root just above the soil line
Root Type: Large, knobby, pale tan root with white interior
Days to Maturity: 100–120 days
Hardiness: Cool-season biennial grown as an annual
Flavor and Culinary Uses
Flavor: Mild, nutty, and earthy with a hint of celery
Culinary Uses: Excellent for mashing, roasting, stews, soups, or raw in slaws and salads. A great low-carb alternative to potatoes.
Companion Planting Tips
Good Companions: Leeks, onions, spinach, and bush beans
Avoid Planting Near: Carrots and parsley, which share diseases and pests
Bonus Benefit: Stores for months when properly cured, providing fresh winter flavor long after harvest
Common Issues and Solutions
Small or Misshapen Roots: Needs rich, well-drained soil and consistent moisture throughout the season
Slow Growth: Start seeds indoors early and transplant after danger of frost
Bolting: Avoid temperature stress and plant in cool, stable weather
Seeds Per Packet
| 250mg | Approximately 535 |
| 500mg | Approximately 1,070 |
| 750mg | Approximately 1,605 |
| 1g | Approximately 2,140 |
Why You’ll Love It
Giant Prague Celeriac is an old-world heirloom grown for its flavorful root, which offers a mild celery-like taste with nutty, earthy undertones. Though not grown for its stalks like regular celery, this variety forms large, rounded roots with smooth, creamy flesh perfect for fall and winter meals. It thrives in cooler weather and stores well after harvest, making it a great option for gardeners who want something deliciously different and deeply satisfying.
Plant Characteristics
Height: 12–18 inches
Growth Habit: Upright greens with a swollen, round root just above the soil line
Root Type: Large, knobby, pale tan root with white interior
Days to Maturity: 100–120 days
Hardiness: Cool-season biennial grown as an annual
Flavor and Culinary Uses
Flavor: Mild, nutty, and earthy with a hint of celery
Culinary Uses: Excellent for mashing, roasting, stews, soups, or raw in slaws and salads. A great low-carb alternative to potatoes.
Companion Planting Tips
Good Companions: Leeks, onions, spinach, and bush beans
Avoid Planting Near: Carrots and parsley, which share diseases and pests
Bonus Benefit: Stores for months when properly cured, providing fresh winter flavor long after harvest
Common Issues and Solutions
Small or Misshapen Roots: Needs rich, well-drained soil and consistent moisture throughout the season
Slow Growth: Start seeds indoors early and transplant after danger of frost
Bolting: Avoid temperature stress and plant in cool, stable weather
Seeds Per Packet
| 250mg | Approximately 535 |
| 500mg | Approximately 1,070 |
| 750mg | Approximately 1,605 |
| 1g | Approximately 2,140 |
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