Growing collards 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 collards against those dates.

Start seeds indoorsMarch 13

Transplant outdoorsApril 24

Direct sow outdoorsApril 17

Expected harvestJune 16 to July 6About 60 to 80 days from sowing.

Plant in fallJuly 2

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 collards from Clemson Cooperative Extension, Home & Garden Information Center. Zone dates are medians; local conditions vary.