Illinois Planting Calendar
Illinois spans USDA hardiness zones 5a, 5b, 6a, 6b, 7a. Planting dates vary significantly across the state depending on your zone. Find your county on the map below for exact frost dates and planting windows.
Find Your County
Click any county to see your local planting calendar with exact frost dates and planting windows.
Hover over a county to see details. Click to view planting guide.
Zones in Illinois
Zone 5a
Winter low: -20 to -15°F
166
Growing Days
Apr 25
Last Frost
Oct 8
First Frost
3
Counties
Zone 5b
Winter low: -15 to -10°F
178
Growing Days
Apr 18
Last Frost
Oct 13
First Frost
25
Counties
Zone 6a
Winter low: -10 to -5°F
193
Growing Days
Apr 10
Last Frost
Oct 20
First Frost
33
Counties
Zone 6b
Winter low: -5 to 0°F
205
Growing Days
Apr 3
Last Frost
Oct 25
First Frost
23
Counties
Zone 7a
Winter low: 0 to 5°F
221
Growing Days
Mar 25
Last Frost
Nov 1
First Frost
18
Counties
Growing Season Comparison
Growing Season by Zone
Zone 1a
Jun 15 – Aug 15
Zone 1b
Jun 7 – Aug 25
Zone 2a
May 30 – Sep 1
Zone 2b
May 22 – Sep 10
Zone 3a
May 15 – Sep 15
Zone 4a
May 6 – Sep 28
Zone 5a
Apr 25 – Oct 8
Zone 5b
Apr 18 – Oct 13
Zone 6a
Apr 10 – Oct 20
Zone 6b
Apr 3 – Oct 25
Zone 7a
Mar 25 – Nov 1
Zone 7b
Mar 18 – Nov 8
Zone 8a
Mar 8 – Nov 18
Zone 8b
Feb 25 – Nov 28
Zone 9a
Feb 10 – Dec 10
Zone 10a
Jan 1 – Dec 31
0
90
180
270
365 days
Frost Dates & Growing Season by County
View all 102 Illinois counties with frost dates
| County | Zone | Last Frost | First Frost | Growing Days |
|---|---|---|---|---|
| Adams County | 6a | Apr 14 | Oct 20 | 189 |
| Alexander County | 7a | Apr 10 | Oct 21 | 194 |
| Bond County | 6b | Apr 13 | Oct 21 | 191 |
| Boone County | 5b | Apr 23 | Oct 16 | 176 |
| Brown County | 6a | Apr 17 | Oct 16 | 182 |
| Bureau County | 5b | Apr 22 | Oct 14 | 175 |
| Calhoun County | 6b | Apr 13 | Oct 21 | 191 |
| Carroll County | 5a | Apr 22 | Oct 13 | 174 |
| Cass County | 6a | Apr 15 | Oct 16 | 184 |
| Champaign County | 6a | Apr 14 | Oct 19 | 188 |
| Christian County | 6a | Apr 13 | Oct 19 | 189 |
| Clark County | 6b | Apr 14 | Oct 17 | 186 |
| Clay County | 6b | Apr 14 | Oct 17 | 186 |
| Clinton County | 6b | Apr 10 | Oct 19 | 192 |
| Coles County | 6a | Apr 14 | Oct 17 | 186 |
| Cook County | 6a | Apr 23 | Oct 17 | 177 |
| Crawford County | 6b | Apr 14 | Oct 23 | 192 |
| Cumberland County | 6b | Apr 14 | Oct 17 | 186 |
| DeKalb County | 5b | Apr 22 | Oct 16 | 177 |
| DeWitt County | 6a | Apr 15 | Oct 17 | 185 |
| Douglas County | 6a | Apr 14 | Oct 17 | 186 |
| DuPage County | 5b | Apr 23 | Oct 17 | 177 |
| Edgar County | 6a | Apr 18 | Oct 17 | 182 |
| Edwards County | 6b | Apr 9 | Oct 28 | 202 |
| Effingham County | 6b | Apr 16 | Oct 17 | 184 |
| Fayette County | 6b | Apr 12 | Oct 18 | 189 |
| Ford County | 6a | Apr 18 | Oct 18 | 183 |
| Franklin County | 7a | Apr 10 | Oct 20 | 193 |
| Fulton County | 6a | Apr 20 | Oct 16 | 179 |
| Gallatin County | 7a | Apr 6 | Oct 30 | 207 |
| Greene County | 6a | Apr 13 | Oct 21 | 191 |
| Grundy County | 5b | Apr 20 | Oct 17 | 180 |
| Hamilton County | 6b | Apr 9 | Oct 23 | 197 |
| Hancock County | 6a | Apr 14 | Oct 18 | 187 |
| Hardin County | 7a | Apr 4 | Oct 31 | 210 |
| Henderson County | 6a | Apr 17 | Oct 17 | 183 |
| Henry County | 5b | Apr 16 | Oct 16 | 183 |
| Iroquois County | 5b | Apr 18 | Oct 13 | 178 |
| Jackson County | 7a | Apr 10 | Oct 21 | 194 |
| Jasper County | 6b | Apr 13 | Oct 20 | 190 |
| Jefferson County | 6b | Apr 9 | Oct 20 | 194 |
| Jersey County | 6b | Apr 11 | Oct 21 | 193 |
| Jo Daviess County | 5a | Apr 24 | Oct 11 | 170 |
| Johnson County | 7a | Apr 7 | Oct 21 | 197 |
| Kane County | 5b | Apr 23 | Oct 17 | 177 |
| Kankakee County | 5b | Apr 20 | Oct 14 | 177 |
| Kendall County | 5b | Apr 20 | Oct 17 | 180 |
| Knox County | 5b | Apr 17 | Oct 15 | 181 |
| LaSalle County | 5b | Apr 22 | Oct 14 | 175 |
| Lake County | 6a | Apr 21 | Oct 20 | 182 |
| Lawrence County | 6b | Apr 13 | Oct 27 | 197 |
| Lee County | 5b | Apr 22 | Oct 14 | 175 |
| Livingston County | 5b | Apr 23 | Oct 17 | 177 |
| Logan County | 6a | Apr 15 | Oct 16 | 184 |
| Macon County | 6a | Apr 13 | Oct 19 | 189 |
| Macoupin County | 6b | Apr 11 | Oct 21 | 193 |
| Madison County | 7a | Apr 11 | Oct 22 | 194 |
| Marion County | 6b | Apr 10 | Oct 19 | 192 |
| Marshall County | 5b | Apr 21 | Oct 13 | 175 |
| Mason County | 6a | Apr 15 | Oct 14 | 182 |
| Massac County | 7a | Apr 7 | Oct 21 | 197 |
| McDonough County | 6a | Apr 17 | Oct 17 | 183 |
| McHenry County | 5b | Apr 18 | Oct 20 | 185 |
| McLean County | 6a | Apr 18 | Oct 18 | 183 |
| Menard County | 6a | Apr 15 | Oct 19 | 187 |
| Mercer County | 5b | Apr 17 | Oct 15 | 181 |
| Monroe County | 7a | Apr 14 | Oct 24 | 193 |
| Montgomery County | 6b | Apr 13 | Oct 21 | 191 |
| Morgan County | 6a | Apr 14 | Oct 17 | 186 |
| Moultrie County | 6a | Apr 14 | Oct 17 | 186 |
| Ogle County | 5b | Apr 23 | Oct 13 | 173 |
| Peoria County | 6a | Apr 23 | Oct 12 | 172 |
| Perry County | 7a | Apr 9 | Oct 20 | 194 |
| Piatt County | 6a | Apr 14 | Oct 16 | 185 |
| Pike County | 6a | Apr 15 | Oct 16 | 184 |
| Pope County | 7a | Apr 7 | Oct 21 | 197 |
| Pulaski County | 7a | Apr 9 | Oct 22 | 196 |
| Putnam County | 5b | Apr 21 | Oct 13 | 175 |
| Randolph County | 7a | Apr 11 | Oct 20 | 192 |
| Richland County | 6b | Apr 13 | Oct 27 | 197 |
| Rock Island County | 5b | Apr 15 | Oct 19 | 187 |
| Saline County | 7a | Apr 8 | Oct 24 | 199 |
| Sangamon County | 6a | Apr 15 | Oct 17 | 185 |
| Schuyler County | 6a | Apr 16 | Oct 20 | 187 |
| Scott County | 6a | Apr 14 | Oct 17 | 186 |
| Shelby County | 6b | Apr 14 | Oct 17 | 186 |
| St. Clair County | 7a | Apr 2 | Nov 2 | 214 |
| Stark County | 5b | Apr 21 | Oct 12 | 174 |
| Stephenson County | 5a | Apr 23 | Oct 13 | 173 |
| Tazewell County | 6a | Apr 19 | Oct 15 | 179 |
| Union County | 7a | Apr 10 | Oct 21 | 194 |
| Vermilion County | 6a | Apr 14 | Oct 16 | 185 |
| Wabash County | 6b | Apr 9 | Oct 28 | 202 |
| Warren County | 5b | Apr 13 | Oct 21 | 191 |
| Washington County | 6b | Apr 9 | Oct 20 | 194 |
| Wayne County | 6b | Apr 8 | Oct 27 | 202 |
| White County | 7a | Apr 8 | Oct 27 | 202 |
| Whiteside County | 5b | Apr 16 | Oct 16 | 183 |
| Will County | 6a | Apr 23 | Oct 17 | 177 |
| Williamson County | 7a | Apr 10 | Oct 20 | 193 |
| Winnebago County | 5b | Apr 26 | Oct 12 | 169 |
| Woodford County | 5b | Apr 23 | Oct 17 | 177 |
🥬 Vegetables
Browse all 116 vegetables you can grow in Illinois
- Acorn Squash
- Amaranth
- Artichoke
- Arugula
- Asparagus
- Beets
- Belgian Endive
- Bitter Melon
- Black Beans
- Bok Choy
- Broccoli
- Broccoli Rabe
- Brussels Sprouts
- Butternut Squash
- Cabbage
- Calabash
- Cardoon
- Carrots
- Cauliflower
- Celeriac
- Celery
- Celtuce
- Chard
- Chayote
- Chickpeas
- Chicory
- Chinese Cabbage
- Christmas Lima Beans
- Collard Greens
- Corn
- Cowpeas
- Cress
- Crookneck Squash
- Crosne
- Cucumber
- Daikon
- Delicata Squash
- Edamame
- Eggplant
- Endive
- Escarole
- Fava Beans
- Fennel
- Garlic
- Ginger
- Green Beans
- Horseradish
- Hot Peppers
- Hubbard Squash
- Jicama
- Kabocha
- Kai Lan
- Kale
- Kidney Beans
- Kohlrabi
- Komatsuna
- Leeks
- Lentils
- Lettuce
- Lima Beans
- Loofah
- Luffa
- Mache
- Malabar Spinach
- Melon
- Microgreens
- Mitsuba
- Mizuna
- Mustard Greens
- Napa Cabbage
- New Zealand Spinach
- Okra
- Onion
- Pac Choi
- Parsnip
- Patty Pan Squash
- Peas
- Peppers
- Pole Beans
- Potatoes
- Pumpkin
- Purslane
- Radicchio
- Radish
- Rhubarb
- Romanesco
- Rutabaga
- Salsify
- Savoy Cabbage
- Scallions
- Scarlet Runner Beans
- Shallot
- Shiso
- Snap Peas
- Snow Peas
- Soybeans
- Spaghetti Squash
- Spinach
- Squash (Summer)
- Squash (Winter)
- Sunchoke
- Sunflower
- Sweet Corn
- Sweet Potatoes
- Tatsoi
- Tomatillo
- Tomatoes
- Turmeric
- Turnip
- Watercress
- Watermelon
- Wax Beans
- Winter Melon
- Yam
- Yard Long Beans
- Zucchini
🍓 Fruits
Browse all 34 fruits you can grow in Illinois
- Alpine Strawberries
- Aronia
- Blackberries
- Blueberries
- Boysenberries
- Cantaloupe
- Che Fruit
- Cranberries
- Currants
- Dragon Fruit
- Elderberries
- Figs
- Goji Berries
- Gooseberries
- Grapes
- Ground Cherry
- Guava
- Hardy Kiwi
- Haskaps
- Honeydew
- Jostaberry
- Kiwi
- Lingonberries
- Loquat
- Medlar
- Mulberries
- Passion Fruit
- Pawpaw
- Persimmon
- Pomegranate
- Quince
- Raspberries
- Serviceberries
- Strawberries
🌿 Herbs
Browse all 42 herbs you can grow in Illinois
- Angelica
- Anise
- Basil
- Bee Balm
- Borage
- Caraway
- Catnip
- Chamomile
- Chervil
- Chives
- Cilantro
- Comfrey
- Cumin
- Dill
- Echinacea
- Epazote
- Fennel (herb)
- Feverfew
- Garlic Chives
- Horehound
- Hyssop
- Lavender
- Lemon Balm
- Lemon Thyme
- Lemon Verbena
- Lemongrass
- Lovage
- Marjoram
- Mint
- Oregano
- Parsley
- Rosemary
- Rue
- Sage
- Savory
- Sorrel
- Stevia
- Tarragon
- Thai Basil
- Thyme
- Valerian
- Yarrow
Monthly Planting Guide for Illinois
The Gardener's Encyclopedia to Companion Planting
$27
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The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
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