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key growing information
Growing Celery & Celeriac: How to Sow, Grow & Care For
How to grow celery and celeriac from seed: soil and water needs, starting seed with light, transplanting, avoiding bolting, pests and disorders, harvest and storage.
By Hensley’s Seed Co.
Celery & Celeriac - Key Growing Information
SCIENTIFIC NAME:
Apium graveolens
CULTURE:
Celery and celeriac need fertile soil with a pH of 6.0–7.0 and steady moisture all season for the best flavor and yield.
DAYS TO MATURITY:
Counted from transplanting.
PELLETED SEED:
Pelleted seed needs evenly moist soil while it germinates. Keep it cool and dry until sowing and use it within a year of purchase. Pellet details are listed on each product page.
TRANSPLANTING:
Start seed 10–12 weeks before planting out, sowing 1/8" deep at about 6 seeds per inch in 20-row open flats or plug trays. The seed needs light to sprout. Keep the mix moist and, if possible, at 70–75°F (21–24°C). Seedlings take 2–3 weeks to emerge, after which you can lower the temperature to 60–70°F (16–21°C). When they have 2 true leaves, move them into 1½" plug trays. Plant outside once the weather is reliably warm, 6–8" apart in rows 24–36" apart, and water to keep the soil moist.
BOLTING:
Young plants bolt if they spend 10 days or more below 55°F (13°C). To harden transplants, cut back on water for 7–10 days rather than exposing them to cold.
CROP MAINTENANCE:
If you want blanched stalks, hill soil around the plants or wrap them in paper collars.
PESTS AND DISEASE:
Rotate crops to limit leaf blights. Adequate calcium and steady watering prevent blackheart. Celery mosaic virus, which causes mottled leaves, twisted stalks and stunting, is spread by aphids, so keep aphids under control.
HARVEST:
Celery: cut stalks once they're big enough to eat but before they turn pithy. Celeriac: dig from late summer into fall when roots are 3–5" across.
POST HARVEST:
Plunge harvested plants into cold water to pull out field heat.
STORAGE:
Store at 32°F (0°C) and 98–100% relative humidity. Celery keeps 1–2 months and celeriac 6–8 months. CAUTION: Rarely, handling the foliage can cause a serious skin rash. On hot, sunny days, wear long sleeves and long pants while working with the crop, and wash exposed skin as soon as you can.SEEDS/OZ.: Varies by variety; see each product page.
PACKET:
250 seeds per packet.
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