Zone 3a monthly plan
August 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
- 17
Get dates for your exact ZIP
Zone averages cover wide areas. Your nearest NOAA station gives a more local frost window.
Planting jobs
Your August checklist
Search a crop or narrow the list by garden action. Dates are shifted from zone 3a's typical frost window.
17 matching actions, with 10 shown first
Fall planting
5- Cabbage
vegetable
June 27 to August 10 sources
- Cauliflower
vegetable
June 27 to August 10 sources
- Kale
vegetable
July 4 to August 80 sources
- Spinach
vegetable
June 27 to August 10 sources
- Swiss Chard
vegetable
August 8 to August 150 sources
Harvest
12- Beet
vegetable
July 7 to August 30 sources
- Carrot
vegetable
July 17 to August 230 sources
- Cucamelon
vegetable
August 7 to August 120 sources
- Fennel
herb
July 28 to August 270 sources
- New Zealand Spinach
vegetable
July 18 to August 140 sources
Show 7 more harvest
- ParsnipAugust 16 to September 12
- PumpkinAugust 7 to October 10
- RomanescoAugust 12 to September 6
- Sweet CornJuly 28 to September 10
- TomatilloAugust 4 to August 26
- WatermelonAugust 22 to September 10
- ZucchiniJuly 23 to August 6
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.