Celery

Think about...

Never let it dry out

Celery needs constant moisture. Even short dry periods can cause tough, stringy, or bitter stems.

Feed the soil well

Celery is a heavy feeder. Rich soil with lots of compost makes a huge difference in size and taste.

Patience at the start

Celery germinates slowly and grows slowly at first. Strong early care leads to much better results later.

Keep it warm early on

Exposure to cold temperatures early can trigger premature bolting. Wait until weather is stable before planting out.

Mulch is your friend

Mulch helps retain moisture and keeps soil cool, both of which are essential for celery.

Harvest from the outside in

Instead of harvesting the whole plant, pick outer stems first to extend the harvest period.

Overview

Size (cm): 40 cm width · 60 cm height
Comfort temperature: 10-22 C
Temperature limit: 0 C
Planting temperature: 10 C
Germination time (days): 14

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General

Celery is a slow-growing, moisture-loving vegetable known for its crisp stalks and aromatic flavor. It is technically biennial but grown as an annual crop. It requires a long, cool growing season and consistent care, making it more demanding than many other vegetables.

Light

Full sun to partial sun.

Soil type

Deep, fertile, moisture-retentive soil rich in organic matter.

Water requirement

High; requires consistently moist soil at all times.

Nutrient requirement

High; needs rich soil and regular feeding.

Precultivation

Sow seeds on the surface of moist seed compost, as they need light to germinate. Maintain temperatures around 18–22°C and keep humidity high. Germination can take 10–20 days. Provide strong light after emergence and transplant carefully once seedlings are large enough to handle.

Planting

Transplant outdoors when temperatures are stable above about 10°C. Harden off plants for 7–10 days before planting. Space about 30–40 cm apart in rows. Choose a sunny or lightly shaded spot with rich, moist soil. Water thoroughly after planting.

Pruning

No pruning required. Remove damaged or yellowing leaves to maintain plant health.

Maintenance

Keep soil consistently moist with frequent watering. Mulch heavily to retain moisture. Feed regularly with compost or liquid fertilizer. Protect from pests and ensure steady growth to avoid tough or bitter stems.

Harvest

Harvest when stalks are well-developed and crisp. Cut whole plants at the base or harvest outer stalks individually. Flavor improves with cooler temperatures.

Common issues

Dry conditions cause stringy, tough stalks. Cold stress can lead to bolting. Nutrient deficiency results in poor growth. Slugs and leaf miners may attack plants.

Rotation schedule

Rotate every 3–4 years, avoiding planting after other Apiaceae such as carrot or parsley.

Pollination

Biennial; flowers in second year and is insect-pollinated.

Companion plants

Leek, onion, cabbage, spinach, tomato.

Incompatible plants

Parsley (can compete closely), very dense plantings.

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