Kankakee County, IL — Planting Guide
Kankakee County is in USDA Zone 5a. The average last spring frost is April 20 and the first fall frost is October 14, giving you a growing season of approximately 177 days.
At an elevation of 1,113 ft, Kankakee County receives approximately 33.6 in of rainfall annually. Summer highs average 85°F with winter lows around 19°F. The predominant soil type is Silt Loam.
Based on 29 years of NOAA climate station data, the last frost date here varies by 32 days year to year — ranging from April 6 in warm years to May 9 in cold years. The growing season is trending shorter by about 2.18 days per decade. Kankakee County scores 63/100 (Good) on the Microclimate Index.
🌡️ Zone
5a (-20°F to -15°F min)
❄️ Last Frost
April 20
🍂 First Frost
October 14
📅 Growing Season
177 days
⛰️ Elevation
1,113 ft
🌧️ Annual Rainfall
33.6 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.4 in | 7 days | — | None |
| Feb | 1.3 in | 7 days | — | None |
| Mar | 2.4 in | 8 days | — | None |
| Apr | 3.4 in | 10 days | 0.9 in | Moderate |
| May | 4.3 in | 11 days | — | Low |
| Jun | 3.7 in | 9 days | 0.6 in | Moderate |
| Jul | 3.6 in | 8 days | 0.7 in | Moderate |
| Aug | 3.7 in | 10 days | 0.6 in | Moderate |
| Sep | 2.8 in | 8 days | 1.5 in | Moderate |
| Oct | 2.7 in | 7 days | 1.6 in | High |
| Nov | 2.5 in | 8 days | — | None |
| Dec | 1.8 in | 7 days | — | None |
Annual total: 33.6 in. Water needs vary by crop — tomatoes need ~1.2"/week while herbs like rosemary need only 0.3"/week. Check individual plant pages for crop-specific water budgets that factor in your county's rainfall and soil drainage.
Kankakee County Soil Profile
Soil Type
Silt Loam
Soil pH
6.1-6.8
Drainage
Well Drained
Frost Risk Probability
Based on 29 years of NOAA weather station data from 2 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | May 9 | Oct 28 | 172 days |
| Cautious | Apr 27 | Oct 21 | 177 days |
| Average year | Apr 20 | Oct 14 | 177 days |
| Optimistic | Apr 15 | Oct 7 | 175 days |
| Aggressive (risky) | Apr 6 | Oct 3 | 180 days |
Not very — frost dates can vary by ±32 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting shorter here (about 2.2 days per decade). Use the "Conservative" dates and choose fast-maturing varieties.
Gardening Difficulty Score
Kankakee County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Kankakee County
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to Kankakee County's climate and soil.
County Extension Office
Kankakee County University of Illinois Extension Extension Office
Phone: 217-333-7672
Visit Extension Office Website →
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in Kankakee County
Finding local nurseries & garden centers in Kankakee County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Kankakee County's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near Kankakee County IL" or "garden center Kankakee County" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden Kankakee County IL" or check your extension office and local parks department. Facebook groups like "Kankakee County Gardeners" or "Illinois Gardening" are also excellent for local advice and plant swaps.
What to Plant After Your Harvest
After your first crops finish, use the remaining frost-free days to grow a second round.
Show 6 more succession options
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
14.9 hours
Summer solstice daylight
Shortest Day
9 hours
Winter solstice daylight
Peak Sun Hours
9.7 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9.4 hr | 3.8 hr | Short day |
| February | 10.4 hr | 4.4 hr | Short day |
| March | 11.7 hr | 5.4 hr | Short day |
| April | 13.1 hr | 7 hr | Neutral |
| May | 14.3 hr | 8.4 hr | Long day |
| June | 14.9 hr | 9.2 hr | Long day |
| July | 14.7 hr | 9.7 hr | Long day |
| August | 13.6 hr | 8.5 hr | Neutral |
| September | 12.3 hr | 7.4 hr | Neutral |
| October | 10.9 hr | 5.8 hr | Short day |
| November | 9.6 hr | 3.7 hr | Short day |
| December | 9 hr | 3.4 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jun through Sep.
Best Month to Compost
Jun
Microbial activity peaks when soil is warm.
Active Composting
6 months
Solid season. Piles go dormant in winter.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 23°F | 30°F | ❄️ Dormant | ~36 weeks |
| Feb | 22°F | 31°F | ❄️ Dormant | ~36 weeks |
| Mar | 32°F | 35°F | ❄️ Dormant | ~36 weeks |
| Apr | 46°F | 44°F | 🐢 Slow | ~24 weeks |
| May | 60°F | 55°F | ♻️ Active | ~14 weeks |
| Jun | 68°F | 64°F | 🔥 Peak | ~8 weeks |
| Jul | 76°F | 70°F | 🔥 Peak | ~8 weeks |
| Aug | 79°F | 74°F | 🔥 Peak | ~8 weeks |
| Sep | 70°F | 70°F | 🔥 Peak | ~8 weeks |
| Oct | 57°F | 59°F | ♻️ Active | ~14 weeks |
| Nov | 44°F | 49°F | 🐢 Slow | ~24 weeks |
| Dec | 29°F | 37°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Kankakee County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash bugs | Moderate | Jun, Jul, Aug |
| Tomato hornworms | Low | Jul, Aug |
| Cabbage loopers | Moderate | May, Jun, Jul, Aug |
| Slugs | Low | Apr, May, Jun |
Organic pest management tips
- Maintain healthy soil with regular compost additions to build natural pest resistance
- Practice crop rotation annually to break pest cycles
- Encourage beneficial insects with flowering herbs like dill, fennel, and yarrow
Cover Crops for Kankakee County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 1 | Aug 5 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Apr 27 | Aug 19 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 24 | Aug 5 | ✓ Yes | Living mulch, fixes nitrogen, permanent ground cover |
Summer Cover Crops (1 options) — Fill gaps and suppress weeds between plantings
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Sunflowers | May 14 | Sep 16 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (6 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 16 | Mar 30 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Aug 28 | Apr 6 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 8 | Mar 30 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 1 | Mar 30 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 24 | Apr 6 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 8 | Mar 30 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 12 mph Summer: 8 mph
Fall: 9 mph Winter: 13 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.2/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (186 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
16,746 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
6 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 1,750 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
May, Jun, Jul, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jan, Feb, Dec
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 33.6 inches of rain per year
- A 1,000 sq ft roof can collect roughly 16,746 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Jan, Feb, Dec)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Kankakee County
Soil Type
Silt Loam
Soil pH 6.1–6.8 · Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 3.5/10
Low-to-moderate drought stress. Plan to water 1–2 times per week during peak summer. (33.6 in. annual rainfall)
Season Tips
177-day frost-free season
Start warm-season crops indoors and focus on short-season varieties. Cold frames extend your season by 3–4 weeks in fall.
Free Garden Planner
Plan your entire garden season — organize planting dates, track what you're growing, and know exactly when to start seeds, transplant, and harvest.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Kankakee County
106 vegetables that grow well in Zone 5a with planting dates for Kankakee County.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 16 | Apr 27 | May 4 | Jul 27 – Aug 31 | 80–100 |
| Amaranth | Feb 23 | Apr 27 | May 4 | Aug 3 – Sep 21 | 90–120 |
| Arugula | Mar 16 | Apr 6 | Apr 20 | May 25 – Jul 27 | 30–50 |
| Asparagus | — | — | May 4 | — | 730–1095 |
| Beets | — | Apr 6 | — | Jun 1 – Jun 29 | 50–70 |
| Belgian Endive | Mar 16 | Apr 6 | Apr 20 | Aug 10 – Oct 5 | 110–150 |
| Bitter Melon | Feb 23 | Apr 27 | May 4 | Jul 6 – Aug 17 | 60–90 |
| Black Beans | — | Apr 27 | — | Jul 27 – Sep 14 | 90–120 |
| Bok Choy | Mar 16 | Apr 6 | Apr 20 | Jun 1 – Jul 6 | 40–60 |
| Broccoli | Mar 16 | Apr 6 | Apr 20 | Jun 22 – Aug 3 | 60–90 |
| Broccoli Rabe | Mar 16 | Apr 6 | Apr 20 | Jun 1 – Jul 6 | 40–60 |
| Brussels Sprouts | Mar 16 | Apr 6 | Apr 20 | Jul 20 – Sep 14 | 90–130 |
| Butternut Squash | Mar 16 | Apr 27 | May 4 | Aug 3 – Sep 7 | 85–110 |
| Cabbage | Mar 16 | Apr 6 | Apr 20 | Jun 22 – Aug 17 | 60–100 |
| Calabash | Feb 23 | Apr 27 | May 4 | Jul 27 – Sep 21 | 80–120 |
| Carrots | — | Apr 6 | — | Jun 8 – Jul 13 | 60–80 |
| Cauliflower | Mar 16 | Apr 6 | Apr 20 | Jun 15 – Aug 17 | 55–100 |
| Celeriac | Mar 16 | Apr 6 | Apr 20 | Aug 3 – Sep 7 | 100–120 |
| Celery | Mar 16 | Apr 6 | Apr 20 | Jul 13 – Sep 7 | 80–120 |
| Celtuce | Mar 16 | Apr 6 | Apr 20 | Jun 22 – Aug 3 | 60–90 |
| Chard | Mar 16 | Apr 6 | Apr 20 | Jun 15 – Aug 3 | 50–60 |
| Chickpeas | Mar 16 | Apr 6 | Apr 20 | Jul 13 – Aug 24 | 80–110 |
| Chicory | Mar 16 | Apr 6 | Apr 20 | Jun 22 – Aug 3 | 60–85 |
| Chinese Cabbage | Mar 16 | Apr 6 | Apr 20 | Jun 15 – Jul 13 | 50–70 |
| Christmas Lima Beans | Feb 23 | Apr 27 | May 4 | Jul 27 – Aug 31 | 80–100 |
| Collard Greens | Mar 16 | Apr 6 | Apr 20 | Jun 15 – Aug 17 | 55–75 |
| Corn | — | Apr 27 | — | Jun 29 – Aug 24 | 60–100 |
| Cowpeas | — | Apr 27 | — | Jun 29 – Aug 10 | 60–90 |
| Cress | Mar 16 | Apr 6 | Apr 20 | May 4 – May 25 | 14–21 |
| Crookneck Squash | Mar 16 | Apr 27 | May 4 | Jun 22 – Jul 20 | 45–60 |
| Crosne | — | Apr 6 | — | Sep 7 – Sep 21 | 150–200 |
| Cucumber | Mar 16 | Apr 27 | May 4 | Jun 29 – Aug 24 | 50–70 |
| Daikon | — | Apr 6 | — | Jun 1 – Jun 29 | 50–70 |
| Delicata Squash | Mar 16 | Apr 27 | May 4 | Jul 27 – Aug 31 | 80–100 |
| Edamame | — | Apr 27 | — | Jul 13 – Aug 24 | 75–100 |
| Eggplant | Feb 9 | Apr 27 | May 4 | Jul 13 – Sep 14 | 65–85 |
| Endive | Mar 16 | Apr 6 | Apr 20 | Jun 8 – Jul 13 | 45–65 |
| Escarole | Mar 16 | Apr 6 | Apr 20 | Jun 15 – Jul 13 | 50–70 |
| Fava Beans | Mar 16 | Apr 6 | Apr 20 | Jul 6 – Aug 17 | 75–100 |
| Fennel | Feb 23 | Apr 27 | May 4 | Jul 6 – Aug 17 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Apr 27 | — | Jun 22 – Aug 17 | 50–65 |
| Horseradish | — | — | May 4 | Sep 7 – Oct 19 | 120–180 |
| Hot Peppers | Feb 9 | Apr 27 | May 4 | Jul 13 – Oct 19 | 70–120 |
| Hubbard Squash | Mar 16 | Apr 27 | May 4 | Aug 17 – Sep 21 | 100–120 |
| Kabocha | Mar 16 | Apr 27 | May 4 | Aug 3 – Aug 31 | 85–100 |
| Kai Lan | Mar 16 | Apr 6 | Apr 20 | Jun 8 – Jul 6 | 45–60 |
| Kale | Mar 16 | Apr 6 | Apr 20 | Jun 15 – Aug 10 | 50–70 |
| Kidney Beans | — | Apr 27 | — | Jul 27 – Aug 31 | 85–110 |
| Kohlrabi | Mar 16 | Apr 6 | Apr 20 | Jun 8 – Jul 13 | 45–65 |
| Komatsuna | Mar 16 | Apr 6 | Apr 20 | May 25 – Jun 29 | 35–50 |
| Leeks | Mar 16 | Apr 6 | Apr 20 | Jul 20 – Oct 5 | 90–150 |
| Lentils | Mar 16 | Apr 6 | Apr 20 | Jul 13 – Aug 24 | 80–110 |
| Lettuce | Mar 16 | Apr 6 | Apr 20 | May 25 – Aug 3 | 30–60 |
| Lima Beans | — | Apr 27 | — | Jun 29 – Aug 10 | 60–90 |
| Mache | Mar 16 | Apr 6 | Apr 20 | Jun 1 – Jul 6 | 40–60 |
| Melon | Mar 16 | Apr 27 | May 4 | Jul 13 – Aug 31 | 70–100 |
| Microgreens | Mar 16 | Apr 6 | Apr 20 | Apr 27 – May 25 | 7–21 |
| Mitsuba | Mar 16 | Apr 6 | Apr 13 | Jun 8 – Aug 3 | 50–70 |
| Mizuna | Mar 16 | Apr 6 | Apr 20 | May 25 – Jun 22 | 30–45 |
| Mustard Greens | Mar 16 | Apr 6 | Apr 20 | May 25 – Jul 27 | 30–50 |
| Napa Cabbage | Mar 16 | Apr 6 | Apr 20 | Jun 15 – Jul 20 | 55–75 |
| New Zealand Spinach | Feb 23 | Apr 27 | May 4 | Jun 29 – Jul 27 | 55–70 |
| Okra | Feb 23 | Apr 27 | May 4 | Jun 29 – Aug 24 | 50–65 |
| Onion | Mar 16 | Apr 6 | Apr 20 | Jul 20 – Sep 7 | 90–120 |
| Pac Choi | Mar 16 | Apr 6 | Apr 20 | Jun 1 – Jun 29 | 40–55 |
| Parsnip | — | Apr 6 | — | Jul 20 – Aug 31 | 100–130 |
| Patty Pan Squash | Mar 16 | Apr 27 | May 4 | Jun 22 – Jul 20 | 45–60 |
| Peas | Mar 16 | Apr 6 | Apr 20 | Jun 15 – Aug 10 | 55–70 |
| Peppers | Feb 9 | Apr 27 | May 4 | Jul 6 – Sep 14 | 60–90 |
| Pole Beans | Feb 23 | Apr 27 | May 4 | Jun 29 – Aug 24 | 55–70 |
| Potatoes | Feb 23 | Apr 27 | May 4 | Jul 13 – Sep 21 | 70–120 |
| Pumpkin | Mar 16 | Apr 27 | May 4 | Aug 3 – Sep 21 | 85–120 |
| Purslane | Mar 16 | Apr 6 | Apr 20 | Jun 1 – Jul 6 | 40–60 |
| Radicchio | Mar 16 | Apr 6 | Apr 20 | Jun 22 – Jul 27 | 60–80 |
| Radish | — | Apr 6 | — | May 4 – May 25 | 22–35 |
| Rhubarb | — | — | May 11 | — | 365–730 |
| Romanesco | Mar 16 | Apr 6 | Apr 20 | Jul 6 – Aug 17 | 75–100 |
| Rutabaga | — | Apr 6 | — | Jun 29 – Aug 3 | 80–100 |
| Salsify | — | Apr 6 | — | Jul 20 – Aug 31 | 100–130 |
| Savoy Cabbage | Mar 16 | Apr 6 | Apr 20 | Jun 29 – Aug 24 | 70–110 |
| Scallions | Mar 16 | Apr 6 | Apr 20 | Jun 15 – Jul 13 | 50–70 |
| Scarlet Runner Beans | Feb 23 | Apr 27 | May 4 | Jul 6 – Aug 10 | 60–80 |
| Shallot | Mar 16 | Apr 6 | Apr 20 | Jul 20 – Sep 7 | 90–120 |
| Shiso | Mar 2 | Apr 27 | May 4 | Jun 29 – Aug 24 | 50–70 |
| Snap Peas | Feb 23 | Apr 27 | May 4 | Jun 29 – Aug 24 | 55–70 |
| Snow Peas | Mar 16 | Apr 6 | Apr 20 | Jun 15 – Aug 10 | 50–65 |
| Soybeans | — | Apr 27 | — | Jul 20 – Sep 14 | 80–120 |
| Spaghetti Squash | Mar 16 | Apr 27 | May 4 | Aug 3 – Aug 31 | 85–100 |
| Spinach | Mar 16 | Apr 6 | Apr 20 | May 25 – Jul 27 | 35–50 |
| Squash (Summer) | Mar 16 | Apr 27 | May 4 | Jun 22 – Aug 24 | 45–65 |
| Squash (Winter) | Mar 16 | Apr 27 | May 4 | Jul 27 – Sep 21 | 80–120 |
| Sunchoke | — | — | May 4 | Aug 24 – Oct 19 | 110–150 |
| Sunflower | Feb 23 | Apr 27 | May 4 | Jul 13 – Aug 31 | 70–100 |
| Sweet Corn | — | Apr 27 | — | Jun 29 – Aug 10 | 60–90 |
| Sweet Potatoes | Feb 23 | Apr 27 | May 4 | Aug 3 – Sep 21 | 90–120 |
| Tatsoi | Mar 16 | Apr 6 | Apr 20 | May 25 – Jun 29 | 35–50 |
| Tomatillo | Feb 23 | Apr 27 | May 4 | Jul 6 – Sep 14 | 60–85 |
| Tomatoes | Feb 23 | Apr 27 | May 4 | Jul 6 – Sep 14 | 60–85 |
| Turnip | — | Apr 6 | — | May 18 – Jun 22 | 40–60 |
| Watercress | Mar 16 | Apr 6 | Apr 20 | Jun 1 – Jul 6 | 40–60 |
| Watermelon | Mar 16 | Apr 27 | May 4 | Jul 13 – Aug 31 | 70–100 |
| Wax Beans | — | Apr 27 | — | Jun 22 – Aug 17 | 50–65 |
| Winter Melon | Feb 23 | Apr 27 | May 4 | Aug 3 – Sep 21 | 90–120 |
| Yard Long Beans | Feb 23 | Apr 27 | May 4 | Jun 29 – Aug 10 | 55–80 |
| Zucchini | Mar 16 | Apr 27 | May 4 | Jun 22 – Aug 17 | 45–60 |
🍓 Fruits to Grow in Kankakee County
27 fruits that grow well in Zone 5a with planting dates for Kankakee County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 11 | Aug 10 – Oct 26 | 90–180 |
| Aronia | — | — | May 11 | — | 730–1095 |
| Blackberries | — | — | May 11 | — | 365–730 |
| Blueberries | — | — | May 11 | — | 730–1095 |
| Boysenberries | — | — | May 11 | — | 365–730 |
| Cantaloupe | — | — | May 11 | Jul 20 – Aug 24 | 70–90 |
| Che Fruit | — | — | May 11 | — | 1095–1825 |
| Cranberries | — | — | May 11 | — | 730–1095 |
| Currants | — | — | May 11 | — | 730–1095 |
| Elderberries | — | — | May 11 | — | 730–1095 |
| Goji Berries | — | — | May 11 | — | 730–1095 |
| Gooseberries | — | — | May 11 | — | 730–1095 |
| Grapes | — | — | May 11 | — | 730–1095 |
| Ground Cherry | — | — | May 11 | Jul 20 – Sep 14 | 65–80 |
| Hardy Kiwi | — | — | May 11 | — | 1095–1825 |
| Haskaps | — | — | May 11 | — | 730–1095 |
| Honeydew | — | — | May 11 | Aug 3 – Sep 14 | 80–110 |
| Jostaberry | — | — | May 11 | — | 730–1095 |
| Lingonberries | — | — | May 11 | — | 730–1095 |
| Medlar | — | — | May 11 | — | 1095–1825 |
| Mulberries | — | — | May 11 | — | 730–1825 |
| Pawpaw | — | — | May 11 | — | 1095–2555 |
| Persimmon | — | — | May 11 | — | 1095–2555 |
| Quince | — | — | May 11 | — | 1095–1825 |
| Raspberries | — | — | May 11 | — | 365–730 |
| Serviceberries | — | — | May 11 | — | 730–1095 |
| Strawberries | — | — | May 11 | Aug 10 – Oct 26 | 90–365 |
🌿 Herbs to Grow in Kankakee County
37 herbs that grow well in Zone 5a with planting dates for Kankakee County.
Show all 37 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Mar 16 | Apr 6 | Apr 13 | — | 365–730 |
| Anise | Mar 16 | Apr 6 | Apr 13 | Jul 13 – Sep 28 | 90–120 |
| Basil | Mar 2 | Apr 27 | May 4 | Jun 29 – Aug 31 | 50–75 |
| Bee Balm | — | — | Apr 27 | Jul 27 – Oct 12 | 90–120 |
| Borage | Mar 16 | Apr 6 | Apr 13 | Jun 8 – Jul 27 | 50–60 |
| Caraway | Mar 16 | Apr 6 | Apr 13 | — | 365–450 |
| Catnip | — | — | Apr 27 | Jun 29 – Aug 31 | 60–80 |
| Chamomile | Mar 16 | Apr 6 | Apr 13 | Jun 15 – Aug 24 | 60–90 |
| Chervil | Mar 16 | Apr 6 | Apr 13 | May 25 – Jul 27 | 40–60 |
| Chives | — | — | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Cilantro | Mar 16 | Apr 6 | Apr 13 | May 25 – Jul 27 | 40–60 |
| Comfrey | — | — | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Cumin | Mar 16 | Apr 6 | Apr 13 | Jul 27 – Sep 28 | 100–120 |
| Dill | Mar 16 | Apr 6 | Apr 13 | May 25 – Jul 27 | 40–60 |
| Echinacea | — | — | Apr 27 | Aug 31 – Oct 12 | 120–180 |
| Epazote | Mar 2 | Apr 27 | May 4 | Jun 22 – Aug 17 | 45–60 |
| Fennel (herb) | Mar 16 | Apr 6 | Apr 13 | Jun 15 – Aug 24 | 60–90 |
| Feverfew | — | — | Apr 27 | Jul 27 – Oct 12 | 90–120 |
| Garlic Chives | — | — | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Horehound | — | — | Apr 27 | Jul 13 – Sep 7 | 75–90 |
| Hyssop | — | — | Apr 27 | Jul 6 – Sep 7 | 70–90 |
| Lavender | — | — | Apr 27 | Jul 27 – Oct 12 | 90–200 |
| Lemon Balm | — | — | Apr 27 | Jun 29 – Aug 17 | 60–70 |
| Lemon Thyme | — | — | Apr 27 | Jul 6 – Sep 7 | 70–90 |
| Lovage | — | — | Apr 27 | Jul 6 – Sep 7 | 70–90 |
| Mint | — | — | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Oregano | — | — | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Parsley | Mar 16 | Apr 6 | Apr 13 | Jun 15 – Aug 17 | 60–80 |
| Rue | — | — | Apr 27 | Jul 6 – Sep 7 | 70–90 |
| Sage | — | — | Apr 27 | Jul 13 – Sep 7 | 75–90 |
| Savory | — | — | Apr 27 | Jun 22 – Aug 17 | 50–70 |
| Sorrel | Mar 16 | Apr 6 | Apr 13 | May 25 – Jul 27 | 40–60 |
| Tarragon | — | — | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Thai Basil | Mar 2 | Apr 27 | May 4 | Jun 29 – Aug 31 | 50–75 |
| Thyme | — | — | Apr 27 | Jul 6 – Sep 7 | 70–90 |
| Valerian | — | — | Apr 27 | Aug 31 – Oct 12 | 120–180 |
| Yarrow | — | — | Apr 27 | Jul 27 – Oct 12 | 90–120 |
Monthly Planting Guide for Kankakee County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Kankakee County.
Frequently Asked Questions
What planting zone is Kankakee County, IL?
Kankakee County is in USDA Hardiness Zone 5a. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in Kankakee County, IL?
Based on 29 years of NOAA weather station data, the median last spring frost in Kankakee County falls around April 20. In 8 out of 10 years, last frost lands between April 6 and May 9 — a 32-day window of variability. Use May 9 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Kankakee County, IL?
The median first fall frost in Kankakee County arrives around October 14. In cold years it can arrive as early as October 3; in mild years as late as October 28. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Kankakee County?
Kankakee County has a frost-free growing season of approximately 177 days. This is enough time for most warm-season crops including tomatoes, peppers, and squash with proper timing. Climate records show the growing season is trending shorter by about 2.18 days per decade.
What is the soil like in Kankakee County for gardening?
Kankakee County has predominantly Silt Loam soil with a pH range of 6.1–6.8 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Kankakee County?
Kankakee County has commercial agriculture that includes Corn, Soybeans, Hay. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Kankakee County a good location for home gardening?
Kankakee County scores 63/100 (Good) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Conditions here are moderate — most common crops grow well with standard timing and care.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Kankakee County gardeners in Zone 5a organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.
