Zone 4a monthly plan
May planting calendar for zone 4a
These actions use zone 4a's typical frost dates and each crop's extension-sourced planting window.
- Last spring frost
- May 12
- First fall frost
- September 28
- Exact actions
- 51
Get dates for your exact ZIP
Zone averages cover wide areas. Your nearest NOAA station gives a more local frost window.
Planting jobs
Your May checklist
Search a crop or narrow the list by garden action. Dates are shifted from zone 4a's typical frost window.
51 matching actions, with 11 shown first
Transplant outdoors
24- Ageratum
flower
May 12 to May 260 sources
- May 12 to May 26
0 sources
- Black-Eyed Susan
flower
May 12 to May 260 sources
- Cantaloupe
vegetable
May 12 to May 260 sources
- Cauliflower
vegetable
April 28 to May 50 sources
Show 19 more transplant outdoors
- CucumberMay 12 to May 26
- DahliaMay 12 to May 26
- EggplantMay 12 to May 26
- French TarragonMay 12
- Globe AmaranthMay 12 to May 26
- Ground CherryMay 12 to May 26
- ImpatiensMay 12 to May 26
- LettuceMay 12
- MarigoldMay 12 to May 26
- PepperMay 12 to May 26
- PetuniaMay 12 to May 26
- RomanescoMay 12
- SpinachMay 12
- Sweet AlyssumMay 5 to May 12
- Swiss ChardMay 12
- TomatilloMay 19 to May 26
- TomatoMay 12 to May 26
- WatermelonMay 12 to May 26
- Wax BegoniaMay 12 to May 26
Direct sow
26- Basil
herb
May 120 sources
- Bok Choy
vegetable
May 120 sources
- Borage
herb
May 120 sources
- Cantaloupe
vegetable
May 12 to May 260 sources
- Cauliflower
vegetable
April 28 to May 50 sources
Show 21 more direct sow
- CosmosMay 12 to May 26
- CucamelonMay 12
- CucumberMay 12 to May 26
- DillMay 12
- FennelMay 12
- German ChamomileMay 5 to May 12
- Green Bean (Snap Bean)May 5
- Luffa GourdMay 12
- MarigoldMay 12 to May 26
- Mexican SunflowerMay 12 to May 26
- Mustard GreensApril 21 to May 12
- NasturtiumMay 12 to May 26
- New Zealand SpinachMay 12 to May 19
- ParsleyMay 12
- PumpkinMay 12 to May 26
- SunflowerMay 12 to May 26
- Sweet CornMay 12 to May 26
- Sweet MarjoramMay 12
- WatermelonMay 12 to May 26
- Winter SquashMay 12 to May 26
- ZucchiniMay 12 to May 26
Harvest
1- Radish
vegetable
May 16 to June 120 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.