Zone 3a monthly plan
May 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
- 84
Get dates for your exact ZIP
Zone averages cover wide areas. Your nearest NOAA station gives a more local frost window.
Source-backed actions
Your May checklist
Search a crop or narrow the list by garden action. Dates are shifted from zone 3a's typical frost window.
Showing 16 of 84 matching actions
Start indoors
13- Bitter Melon
vegetable
- Bok Choy
vegetable
April 17 to May 1SourceCornell University Home Gardening - Cucamelon
vegetable
April 17 to May 1SourceUniversity of Wisconsin-Madison Division of Extension - Cucumber
vegetable
- Fennel
herb
April 17 to May 1SourceUtah State University Extension
Transplant outdoors
29- Ageratum
flower
- Black-Eyed Susan
flower
- Broccoli
vegetable
May 8 to May 15SourceUtah State University Extension - Cabbage
vegetable
May 8 to May 15SourceUtah State University Extension
Direct sow
41- Basil
herb
- Beet
vegetable
May 8 to May 15SourceUtah State University Extension - Bok Choy
vegetable
- Borage
herb
- Broccoli
vegetable
May 8 to May 15SourceUtah State University Extension
Fall planting
1- Brussels Sprouts
vegetable
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.