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Sprout Authority

Growing kohlrabi in zone 3b

(Zone 3b = an average winter low of -35°F to -30°F.)

In USDA zone 3b, the typical last spring frost is May 17 and the first fall frost is September 23. Here is when to plant kohlrabi against those dates.

Direct sow outdoorsApril 19 to May 3
Expected harvestJune 8 to July 2About 50 to 60 days from sowing.
Plant in fallJuly 1 to July 29

These are zone 3b averages

Computed from 224 ZIP codes in zone 3b. 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 kohlrabi from Iowa State University Extension and Outreach. Zone dates are medians; local conditions vary.