When to Plant Cucumber in Zone 3b

Cucumis sativus

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

Plant Cucumber in Zone 3b

  • Start indoors: Apr 15
  • Transplant: Jun 1 — after last frost (May 8)
  • First harvest: Jul 20 (50–70 days)
⚠️ Zone 3b last frost: May 8. Don't plant frost-sensitive crops before this date.
Last frost
May 8
First frost
Sep 22
Growing season
137 days
Zone 3b is the warmer half of Zone 3

Zone 3b has a last frost around May 8 and first frost around Sep 22, giving you approximately 137 growing days. This is about 2 weeks longer than Zone 3a. For more details see the Zone 3 complete guide.

Other Zones for Cucumber

Zone 3Zone 4Zone 5Zone 6Zone 7Zone 8Zone 9Zone 10Zone 11Zone 12Zone 13
📚 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.