Zone 4a monthly plan

August 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: 16

Get dates for your exact ZIP

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

Exact August dates

Planting jobs

Your August checklist

Search a crop or narrow the list by garden action. Dates are shifted from zone 4a's typical frost window.

16 matching actions, with 10 shown first

Fall planting

Cabbage
vegetable
July 20 to August 24
0 sources
Cauliflower
vegetable
July 20 to August 24
0 sources
Kale
vegetable
July 27 to August 31
0 sources
Kohlrabi
vegetable
July 6 to August 3
0 sources
Lettuce
vegetable
June 29 to August 3
0 sources

Show 3 more fall planting

RutabagaJuly 27 to August 3
SpinachJuly 20 to August 24
Swiss ChardAugust 31 to September 7

Harvest

Carrot
vegetable
June 30 to August 6
0 sources
Fennel
herb
July 11 to August 10
0 sources
Parsnip
vegetable
July 30 to August 26
0 sources
Pumpkin
vegetable
July 21 to September 23
0 sources
Romanesco
vegetable
July 26 to August 20
0 sources

Show 3 more harvest

Sweet CornJuly 11 to August 24
TomatilloJuly 18 to August 9
WatermelonAugust 5 to August 24

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.