When to Plant Radish in Zone 8b

Raphanus sativus

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

Plant Radish in Zone 8b

  • Direct sow: Mar 20
  • First harvest: Apr 16 (22–35 days)
⚠️ Zone 8b last frost: Mar 13. Don't plant frost-sensitive crops before this date.
Last frost
Mar 13
First frost
Nov 12
Growing season
244 days
Zone 8b is the warmer half of Zone 8

Zone 8b has a last frost around Mar 13 and first frost around Nov 12, giving you approximately 244 growing days. This is about 2 weeks longer than Zone 8a. For more details see the Zone 8 complete guide.

Other Zones for Radish

Zone 2Zone 3Zone 4Zone 5Zone 6Zone 7Zone 8Zone 9Zone 10Zone 11
📚 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.