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Sprout Authority

Growing radish in zone 9b

In USDA zone 9b, the typical last spring frost is February 1 and the first fall frost is December 9. Here is when to plant radish against those dates.

Direct sow outdoorsJanuary 11 to January 18
Expected harvestFebruary 5 to March 4About 25 to 45 days from sowing.

These are zone 9b averages

Computed from 2,081 ZIP codes in zone 9b. Your town's frost dates vary; enter your ZIP for dates built on your nearest weather station.

Get my exact dates

USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service / Oregon State University PRISM Group. NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020. Planting windows for radish from Utah State University Extension. Zone dates are medians; local conditions vary.