When to Plant Celery in Zone 6

Apium graveolens

Last updated: Apr 29, 2026 · Sources: USDA, NOAA, Cooperative Extension
Action Plan

Plant Celery in Zone 6

  • Start indoors: Mar 4
  • Transplant: Apr 22 — after last frost (Apr 15)
  • First harvest: Aug 2 (85–120 days after planting)
⚠️ Don't plant before last frost (Apr 15) — cold snaps kill young transplants.
Last frost
Apr 15
First frost
Oct 15
Growing season
183 days
Quick Facts
Sunlight ☀️ Full Sun
Water Needs 💧💧💧 High
Spacing 10 inches apart
Planting Depth 0.125 inch
Min Soil Temp 50°F
Germination 14–21 days
Days to Maturity 85–120 days
Frost Tolerance Light frost tolerance
Soil pH 6.0–7.0
Difficulty Hard
What you'll need — Zone 6
🛒 Celery — Seeds & Supplies
  • 🌱 Celery Seeds
  • 🌱 Liquid Nitrogen Fertilizer
  • 🌱 Seed Starting Heat Mat

Search for these at your local garden center or nursery.

Growing Tips

  • Celery is one of the most demanding vegetables — needs consistent moisture and cool temps.
  • Start indoors 10–12 weeks before transplanting — one of the earliest starts.
  • Blanch by banking soil or wrapping stems for sweeter, less bitter flavor.
  • Water deeply every other day — celery is ~95% water and wilts fast.
  • Feed with nitrogen every 2–3 weeks for steady leaf growth.

Common Mistakes

  • Starting too late — celery needs a long head start and can't be rushed.
  • Inconsistent watering — the #1 cause of stringy, hollow stalks.
  • Not blanching — unblanched celery is very bitter.
  • Transplanting before temperatures stabilize — cold snaps cause bolting.

Companion Planting

Companion planting improves growth, deters pests, and makes better use of garden space.

✓ Good Companions

Tomato Cabbage Beans

✗ Avoid Nearby

Parsnip

Celery Schedule — All Zones

ZoneStart IndoorsTransplant Direct SowHarvest StartHarvest End
Zone 3 Apr 3 May 22 — Sep 1 Sep 12
Zone 4 Mar 29 May 17 — Aug 27 Sep 22
Zone 5 Mar 19 May 7 — Aug 17 Oct 2
Zone 6 Mar 4 Apr 22 — Aug 2 Oct 6
Zone 7 Feb 22 Apr 12 — Jul 23 Sep 26
Zone 8 Feb 6 Mar 27 — Jul 7 Sep 10
Zone 9 Jan 17 Mar 7 — Jun 17 Aug 21
Zone 10 Dec 30 Feb 17 — May 30 Aug 3

Other Zones for Celery

Zone 3 · Zone 4 · Zone 5 · Zone 7 · Zone 8 · Zone 9 · Zone 10

📚 Data Sources
Frost dates: NOAA Climate Normals 1991–2020, National Centers for Environmental Information.
Hardiness zones: USDA Plant Hardiness Zone Map, Agricultural Research Service.
Growing requirements: Cooperative Extension Services — NC State, Penn State, University of Florida IFAS.
Companion planting: Cornell University Cooperative Extension.
Data compiled from public agricultural sources. Always verify with your local extension office for micro-climate adjustments.