Zone 3b monthly plan
September planting calendar for zone 3b
These actions use zone 3b's typical frost dates and each crop's extension-sourced planting window.
- Last spring frost
- May 17
- First fall frost
- September 23
- Exact actions
- 3
Get dates for your exact ZIP
Zone averages cover wide areas. Your nearest NOAA station gives a more local frost window.
Planting jobs
Your September checklist
Search a crop or narrow the list by garden action. Dates are shifted from zone 3b's typical frost window.
3 matching actions, with 3 shown first
Fall planting
2- Garlic
vegetable
September 30 to October 70 sources
- Swiss Chard
vegetable
August 26 to September 20 sources
Harvest
1- Pumpkin
vegetable
July 26 to September 280 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.