Growing collards 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 collards against those dates.

Start seeds indoorsMarch 22

Transplant outdoorsMay 3

Direct sow outdoorsApril 26

Expected harvestJune 25 to July 15About 60 to 80 days from sowing.

Plant in fallJune 24

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