Zone 3a monthly plan

September planting calendar for zone 3a

These actions use zone 3a's typical frost dates and each crop's extension-sourced planting window.

Last spring frost: May 29
First fall frost: September 5
Exact actions: 6

Get dates for your exact ZIP

Zone averages cover wide areas. Your nearest NOAA station gives a more local frost window.

Exact September dates

Planting jobs

Your September checklist

Search a crop or narrow the list by garden action. Dates are shifted from zone 3a's typical frost window.

6 matching actions, with 6 shown first

Fall planting

Garlic
vegetable
September 12 to September 19
0 sources

Harvest

Parsnip
vegetable
August 16 to September 12
0 sources
Pumpkin
vegetable
August 7 to October 10
0 sources
Romanesco
vegetable
August 12 to September 6
0 sources
Sweet Corn
vegetable
July 28 to September 10
0 sources
Watermelon
vegetable
August 22 to September 10
0 sources

How this checklist is sourced

USDA defines the hardiness zone, NOAA normals provide the typical frost anchors, and each crop's extension source supplies the planting offset. Broad season-only notes are kept on plant profiles because they do not change from one zone page to another.

USDA Plant Hardiness Zone Map, 2023 by USDA Agricultural Research Service / Oregon State University PRISM Group. the USDA hardiness-zone band.
U.S. Climate Normals 1991-2020 by NOAA National Centers for Environmental Information. the median spring and fall freeze dates.

Local conditions vary.