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Sprout Authority

Growing spinach in zone 4b

In USDA zone 4b, the typical last spring frost is May 8 and the first fall frost is October 1. Here is when to plant spinach against those dates.

Start seeds indoorsMarch 27 to April 3
Transplant outdoorsMay 8
Direct sow outdoorsApril 10 to April 17
Plant in fallJuly 23 to August 27

These are zone 4b averages

Computed from 1,251 ZIP codes in zone 4b. 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 spinach from Utah State University Extension. Zone dates are medians; local conditions vary.