When to Plant Celery in Zone 4a

Apium graveolens

Last updated: May 15, 2026 · Sources: USDA, NOAA, Cooperative Extension
Action Plan

Plant Celery in Zone 4a

  • Start indoors: Mar 29
  • Transplant: May 17 — after last frost (May 17)
  • First harvest: Aug 27 (85–120 days)
⚠️ Zone 4a last frost: May 17. Don't plant frost-sensitive crops before this date.
Last frost
May 17
First frost
Sep 18
Growing season
124 days
Zone 4a is the colder half of Zone 4

Zone 4a has a last frost around May 17 and first frost around Sep 18, giving you approximately 124 growing days. This is about 2 weeks shorter than Zone 4b. For more details see the Zone 4 complete guide.

Other Zones for Celery

Zone 3Zone 4Zone 5Zone 6Zone 7Zone 8Zone 9Zone 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.