Free planting calendar
Illinois planting calendar for 2026.
In Illinois, the typical last spring frost is around April 20 and the first fall frost is around October 18, giving about 181 frost-free days. The state spans USDA hardiness zones 5b to 6b. Here is what to sow each month, plus how to dial it to your exact ZIP code.
Illinois at a glance
| Typical last spring frost | April 20 |
| Typical first fall frost | October 18 |
| Growing season | about 181 days |
| USDA hardiness zones | 5b, 6a, 6b |
| Population centers | Arlington Heights, Carol Stream, Evanston, Oak Park |
Typical statewide averages from NOAA frost normals. Your town can differ by a week or two, so check your ZIP code for exact dates.
What to plant in Illinois, month by month
Sow windows below are counted from Illinois’s typical frost dates. Tender crops wait until after the last frost; hardy crops can start earlier.
| Month | What to sow |
|---|---|
| January | Parsnip · Leek · Celeriac |
| February | Snap Pea · Spinach · Cabbage · Broccoli · Cauliflower · Onion, bulb · English Shelling Pea · Tatsoi · Mizuna · Sorrel · Parsnip · Leek · Shallot · Salsify · Celeriac · Onion |
| March | Snap Pea · Potato · Cilantro · Parsley · Lettuce, leaf · Lettuce, romaine · Lettuce, head · Spinach · Arugula · Kale · Swiss Chard · Collards · Mustard Greens · Cabbage · Broccoli · Cauliflower · Kohlrabi · Carrot · Beet · Radish · Turnip · Onion, bulb · Onion, bunching · Fava Bean (Broad Bean) · English Shelling Pea · Napa Cabbage · Bok Choy · Rapini (Broccoli Raab) · Gai Lan (Chinese Broccoli) · Tatsoi · Mizuna · Daikon Radish · Endive · Escarole · Sorrel · Watercress · Celery · Parsnip · Leek · Shallot · Salsify · Fennel, Florence · Chervil · Raspberry, red · Gooseberry · Currant, black · Haskap (Honeyberry) · Asparagus · Rhubarb · Sunchoke (Jerusalem Artichoke) · Artichoke, globe · Lettuce · Onion · Calendula (Pot Marigold) · Mache (Corn Salad) · Cress, garden · Currant, red |
| April | Tomato, slicing · Tomato, cherry · Tomato, paste · Cucumber, slicing · Cucumber, pickling · Squash, summer · Sweet Corn · Bush Bean · Pole Bean · Snap Pea · Potato · Cilantro · Parsley · Lettuce, leaf · Lettuce, romaine · Lettuce, head · Spinach · Arugula · Kale · Swiss Chard · Collards · Mustard Greens · Kohlrabi · Carrot · Beet · Radish · Turnip · Onion, bunching · Lima Bean (Bush) · Edamame (Soybean) · Fava Bean (Broad Bean) · English Shelling Pea · Garbanzo Bean (Chickpea) · Bok Choy · Gai Lan (Chinese Broccoli) · Mizuna · Endive · Escarole · Sorrel · Amaranth Leaf · New Zealand Spinach · Watercress · Celery · Fennel, Florence · Tomatillo · Ground Cherry · Strawberry, day-neutral · Dill · Oregano · Thyme · Rosemary · Sage · Mint · Chives · Chervil · Blueberry · Raspberry, red · Blackberry · Strawberry, June-bearing · Gooseberry · Currant, black · Haskap (Honeyberry) · Elderberry · Asparagus · Rhubarb · Horseradish · Sunchoke (Jerusalem Artichoke) · Artichoke, globe · Lavender · Borage · Catmint (Catnip) · Scarlet Runner Bean · Popcorn · Tomato · Cucumber · Bean · Lettuce · Nasturtium · Calendula (Pot Marigold) · Chamomile, German · Mache (Corn Salad) · Cress, garden · Currant, red |
| May | Tomato, slicing · Tomato, cherry · Tomato, paste · Pepper, bell · Pepper, hot · Eggplant · Cucumber, slicing · Cucumber, pickling · Squash, summer · Squash, winter · Watermelon · Cantaloupe · Okra · Sweet Corn · Bush Bean · Pole Bean · Sweet Potato · Basil · Swiss Chard · Lima Bean (Bush) · Edamame (Soybean) · Southern Pea (Black-Eyed Pea) · Garbanzo Bean (Chickpea) · Amaranth Leaf · New Zealand Spinach · Tomatillo · Ground Cherry · Honeydew Melon · Spaghetti Squash · Acorn Squash · Luffa Gourd · Sunflower, confection · Strawberry, day-neutral · Pepper, banana · Pepper, poblano · Pepper, serrano · Pepper, cayenne · Pepper, shishito · Pepper, habanero · Dill · Oregano · Thyme · Rosemary · Sage · Mint · Chives · Tarragon · Marjoram · Chervil · Lemon Balm · Summer Savory · Blueberry · Raspberry, red · Blackberry · Strawberry, June-bearing · Gooseberry · Currant, black · Elderberry · Asparagus · Rhubarb · Horseradish · Sunchoke (Jerusalem Artichoke) · Ginger · Turmeric · Peanut · Lavender · Lemongrass · Bay Laurel · Borage · Stevia · Catmint (Catnip) · Shiso (Perilla) · Scarlet Runner Bean · Popcorn · Cucamelon (Mouse Melon) · Malabar Spinach · Tomato · Pepper, sweet · Cucumber · Bean · Nasturtium · Calendula (Pot Marigold) · Chamomile, German · Cress, garden · Currant, red |
| June | Tomato, slicing · Tomato, cherry · Tomato, paste · Pepper, bell · Pepper, hot · Eggplant · Cucumber, slicing · Cucumber, pickling · Squash, summer · Squash, winter · Pumpkin · Watermelon · Cantaloupe · Okra · Sweet Corn · Bush Bean · Pole Bean · Sweet Potato · Basil · Lima Bean (Bush) · Edamame (Soybean) · Southern Pea (Black-Eyed Pea) · Salsify · Tomatillo · Ground Cherry · Honeydew Melon · Spaghetti Squash · Acorn Squash · Luffa Gourd · Sunflower, confection · Pepper, banana · Pepper, poblano · Pepper, serrano · Pepper, cayenne · Pepper, shishito · Pepper, habanero · Dill · Oregano · Thyme · Rosemary · Sage · Mint · Chives · Tarragon · Marjoram · Lemon Balm · Summer Savory · Ginger · Turmeric · Peanut · Lavender · Lemongrass · Bay Laurel · Borage · Stevia · Catmint (Catnip) · Shiso (Perilla) · Scarlet Runner Bean · Popcorn · Cucamelon (Mouse Melon) · Malabar Spinach · Tomato · Pepper, sweet · Cucumber · Bean · Nasturtium |
| July | Cucumber, slicing · Cucumber, pickling · Squash, summer · Squash, winter · Pumpkin · Okra · Sweet Corn · Bush Bean · Sweet Potato · Basil · Parsley · Kale · Swiss Chard · Collards · Mustard Greens · Cabbage · Broccoli · Cauliflower · Kohlrabi · Carrot · Beet · Turnip · Onion, bunching · Lima Bean (Bush) · Southern Pea (Black-Eyed Pea) · English Shelling Pea · Brussels Sprouts · Napa Cabbage · Bok Choy · Rapini (Broccoli Raab) · Gai Lan (Chinese Broccoli) · Tatsoi · Mizuna · Daikon Radish · Endive · Escarole · Radicchio · Celery · Parsnip · Leek · Salsify · Celeriac · Rutabaga · Fennel, Florence · Spaghetti Squash · Acorn Squash · Luffa Gourd · Sunflower, confection · Marjoram · Summer Savory · Cucumber · Bean |
| August | Squash, summer · Bush Bean · Cilantro · Parsley · Lettuce, leaf · Lettuce, romaine · Lettuce, head · Spinach · Arugula · Kale · Swiss Chard · Collards · Mustard Greens · Cabbage · Broccoli · Cauliflower · Kohlrabi · Carrot · Beet · Radish · Turnip · Onion, bunching · English Shelling Pea · Brussels Sprouts · Napa Cabbage · Bok Choy · Rapini (Broccoli Raab) · Gai Lan (Chinese Broccoli) · Tatsoi · Mizuna · Daikon Radish · Endive · Escarole · Radicchio · Sorrel · Watercress · Celery · Parsnip · Leek · Salsify · Celeriac · Rutabaga · Fennel, Florence · Dill · Chervil · Bean · Lettuce · Calendula (Pot Marigold) · Mache (Corn Salad) · Cress, garden |
| September | Cilantro · Parsley · Lettuce, leaf · Lettuce, romaine · Lettuce, head · Spinach · Arugula · Kale · Swiss Chard · Collards · Mustard Greens · Radish · Garlic · Onion, bunching · Bok Choy · Rapini (Broccoli Raab) · Tatsoi · Mizuna · Daikon Radish · Sorrel · Watercress · Shallot · Dill · Chervil · Lettuce · Calendula (Pot Marigold) · Mache (Corn Salad) · Cress, garden |
| October | Lettuce, leaf · Lettuce, romaine · Arugula · Garlic · Shallot · Chervil · Lettuce · Mache (Corn Salad) · Cress, garden |
| November | Garlic · Shallot |
| December | Nothing sows outdoors — plan beds and order seeds. |
Plan your Illinois garden
A calendar tells you when. A plan tells you how much. Start from what you want to eat and PlotToTable sizes the beds, counts the plants, and dates every sowing for your exact ZIP code.
- Planting calendar by ZIP code — exact frost dates for your town, not just the state average.
- How to plan a vegetable garden — the six-step method.
- Frost dates explained — why these two dates drive everything.
- What to plant now in zone 6 — this month’s full sow list.
Illinois planting questions
When is the last frost in Illinois?+
The typical last spring frost across Illinois is around April 20, and the first fall frost is around October 18, giving roughly a 181-day growing season. Your exact dates depend on your local area and elevation, so enter your ZIP code in the planting calendar tool for numbers tuned to your spot.
What USDA hardiness zone is Illinois in?+
Illinois spans USDA hardiness zones 5b to 6b. Most of the state falls in zone 6. Colder and higher-elevation areas trend to the lower zone numbers; milder and coastal areas to the higher ones.
What can I plant right now in Illinois?+
It depends on the month. Tender crops like tomatoes and peppers go out after the last frost (around April 20); hardy crops like peas, kale, and carrots can be sown weeks earlier. The month-by-month table on this page lists what to sow in Illinois for each month of the year.
Is this planting calendar free?+
Yes. This Illinois calendar and the ZIP-code planting tool are free with no account. If you want a full garden plan built around what you want to eat, with plant counts and spacing, PlotToTable's planner is free to start too.