Zone 5 · Fruiting Veg Growing Guide

When to Plant Celery
in Zone 5

The most demanding crop in this guide — needs consistent moisture, steady cool temperatures, and a very long season. But homegrown celery has a depth of flavour you'll never find in a supermarket. Start early, be patient.

Plant outdoors
Apr 25 – May 15
Start indoors
Feb 15 – Mar 1
Last Frost
~Apr 15
Days to harvest
100–130 days
Difficulty
Hard
Start indoors — Zone 5
Harvest window: Jul – Oct

Planting Calendar

In Zone 5, Celery should be planted outdoors Apr 25 – May 15, after the average last frost date of approximately Apr 15. Start seeds indoors around Feb 15 – Mar 1 for a head start.

Good zone. Blanch stems by hilling soil or wrapping with cardboard for milder, less bitter flavour.

Care Guide

Sunlight
Full sun to partial shade · 4–8 hrs/day
Watering
High
Spacing
8–10 inches
Soil
Rich, moisture-retentive, well-draining
Days to maturity
100–130 days
Soil pH
6.0–7.0
plant tip · Zone 5

Good zone. Blanch stems by hilling soil or wrapping with cardboard for milder, less bitter flavour.

Feeding Schedule

How often
every 2 weeks
Feed type
high nitrogen
Key timing
throughout growing season

One of the heaviest feeders in the vegetable garden. Liquid feed every 2 weeks. Inconsistent feeding produces stringy, bitter stalks.

Companion Planting for Celery

What you plant next to celery makes a real difference — some plants actively help, others compete or attract pests.

Grows well with
  • Tomatoes
  • Brassicas
  • Beans
  • Leeks
Keep away from
  • Corn
  • Fennel
  • Parsnips

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Common questions

In Zone 5, start celery seeds indoors around Feb 15 – Mar 1, then transplant outdoors Apr 25 – May 15 after your last frost around Apr 15. Good zone. Blanch stems by hilling soil or wrapping with cardboard for milder, less bitter flavour.
Zone 5 has an average last spring frost of approximately Apr 15 and a first fall frost around Oct 15. These dates vary by specific location — use your ZIP code in the plant app for precision based on the nearest NOAA weather station.
Good companion crops for celery include Tomatoes, Brassicas, Beans, Leeks. Avoid planting near Corn, Fennel, Parsnips, which can compete for nutrients or attract pests.
Celery typically takes 100–130 days from transplant or direct sow to harvest in Zone 5. Expected harvest window: Jul – Oct.

Free app · iOS February 2028

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Celery in other zones
Crop Guides