Celery

Celery

Apium graveolens

Start celery indoors 12 weeks before your last spring frost, then plant out 2 weeks after your last spring frost. Space plants 8 in (20 cm) apart.

Photo: Simon Mannweiler, CC BY-SA 4.0 · source

When to plant

Timed from your frost dates, so it holds wherever you garden. Give yours and every step below becomes a date.

See the dates for your garden

Enter your average last spring frost and first fall frost. Every timing on this site turns into a calendar date. Not sure of yours? Your local extension service or a search for “last frost date” and your town will tell you; the app finds them from your location.

Last spring frost
First fall frost

Saved in this browser only. Nothing is sent anywhere.

Optimal Spring Indoor Start

From seedRecommended
  1. Start indoors12 weeks before your last spring frost
  2. Begin hardening off1 week after your last spring frost
  3. Plant out2 weeks after your last spring frost
  4. First harvestabout 100 days after planting out

Optimal Fall Indoor Start

From seed
  1. Start indoorsabout 24 weeks before your first fall frost
  2. Begin hardening offabout 18 weeks before your first fall frost
  3. Plant outabout 17 weeks before your first fall frost
  4. First harvestabout 100 days after planting out

Growing celery

Spacing in the row
8 in (20 cm)
Between rows
24 in (61 cm)
Planting depth
1/8 inch
Sun
Full Sun
Soil
Fertile, well-draining loam, high in organic matter.
Germination
10-21 days at 65-75°F
Harvest season
Summer, Fall
Mature height
18-24 inches
Life cycle
Biennial

Sow seeds very shallowly; require light for germination. Keep consistently moist.

Watering. Requires abundant, consistent moisture; do not allow soil to dry out.

Neighbours

The companion chart →

Grows well beside

Keep apart from

Feeding

Seedlings
Start with dilute liquid fertilizer (e.g., 1/4 strength) once true leaves appear.
Growing
Regular feeding with balanced liquid fertilizer (e.g., 5-10-10 or 10-10-10) every 2-3 weeks.
How often
Every 2-3 weeks after transplant.
Note
Celery is a heavy feeder, particularly requiring adequate nitrogen and potassium for stalk development.

Your celery, planned to the day.

Canopy turns these timings into dates from your own frost data, places every plant at its spacing on your garden map, and tracks it all the way to harvest.

Add celery to your planting calendar →

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