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Sprout Authority

Growing basil in zone 3b

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 basil against those dates.

Start seeds indoorsMarch 22 to April 5
Direct sow outdoorsMay 17

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 basil from University of Minnesota Extension. Zone dates are medians; local conditions vary.