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Randolph County, IL — Planting Guide

Randolph County is in USDA Zone 7a. The average last spring frost is April 11 and the first fall frost is October 20, giving you a growing season of approximately 192 days.

At an elevation of 501 ft, Randolph County receives approximately 32.8 in of rainfall annually. Summer highs average 86°F with winter lows around 26°F. The predominant soil type is Silt Loam.

🌡️ Zone

7a (0°F to 5°F min)

❄️ Last Frost

April 11

🍂 First Frost

October 20

📅 Growing Season

192 days

⛰️ Elevation

501 ft

🌧️ Annual Rainfall

32.8 in

Randolph County, IL Moderate season
192 days
Last Spring Frost April 11
192 growing days
First Fall Frost October 20

Randolph County Soil Profile

Soil Type

Silt Loam

Soil pH

6.0-7.0

Drainage

Well Drained

Zone 7a Frost Countdown
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Last Frost: Apr 11 First Frost: Oct 20

Soil & Growing Conditions in Randolph County

Soil Type

Silt Loam

Ideal for most crops — holds moisture and nutrients while draining well.

Watering Needs

Moderate rainfall (32.8 in.) — plan to water 1–2 times per week during the growing season.

Season Tips

192-day frost-free season

Plenty of time for warm-season crops. Start heat-lovers indoors 6–8 weeks before last frost to maximise your harvest window.

Your Free Printable Garden Planner

Plan every bed, every planting, every harvest — in one place. This 22-page printable includes your zone's planting calendar, a month-by-month task list, a seed inventory tracker, a harvest log, and succession-planting charts. Built to print, write in, and actually use all season.

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Recommended for Your Garden

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Soil Test Kit $12-25

Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.

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Digital pH Meter $10-20

Get instant, accurate soil pH readings to fine-tune your amendments.

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Organic Compost $8-30

Boost soil fertility and structure with rich, well-aged organic compost.

🥬 Vegetables to Grow in Randolph County

112 vegetables that grow well in Zone 7a with planting dates for Randolph County.

Show all 112 vegetables with planting dates
Plant Start Indoors Direct Sow Transplant Fall Plant Harvest Days to Maturity
Acorn Squash Mar 14 Apr 18 Apr 25 Jul 18 – Aug 22 80–100
Amaranth Feb 21 Apr 18 Apr 25 Jul 25 – Sep 12 90–120
Artichoke Apr 25 Aug 29 – Nov 7 120–180
Arugula Mar 7 Mar 28 Apr 11 Aug 11 May 16 – Jul 18 30–50
Asparagus Apr 25 730–1095
Beets Mar 28 Aug 11 May 23 – Jun 20 50–70
Belgian Endive Mar 7 Mar 28 Apr 11 Aug 11 Aug 1 – Sep 26 110–150
Bitter Melon Feb 21 Apr 18 Apr 25 Jun 27 – Aug 8 60–90
Black Beans Apr 18 Jul 18 – Sep 5 90–120
Bok Choy Mar 7 Mar 28 Apr 11 Aug 11 May 23 – Jun 27 40–60
Broccoli Mar 7 Mar 28 Apr 11 Aug 11 Jun 13 – Jul 25 60–90
Broccoli Rabe Mar 7 Mar 28 Apr 11 Aug 11 May 23 – Jun 27 40–60
Brussels Sprouts Mar 7 Mar 28 Apr 11 Aug 11 Jul 11 – Sep 5 90–130
Butternut Squash Mar 14 Apr 18 Apr 25 Jul 25 – Aug 29 85–110
Cabbage Mar 7 Mar 28 Apr 11 Aug 11 Jun 13 – Aug 8 60–100
Calabash Feb 21 Apr 18 Apr 25 Jul 18 – Sep 12 80–120
Cardoon Apr 25 Aug 29 – Oct 10 120–150
Carrots Mar 28 Aug 11 May 30 – Jul 4 60–80
Cauliflower Mar 7 Mar 28 Apr 11 Aug 11 Jun 6 – Aug 8 55–100
Celeriac Mar 7 Mar 28 Apr 11 Aug 11 Jul 25 – Aug 29 100–120
Celery Mar 7 Mar 28 Apr 11 Aug 11 Jul 4 – Aug 29 80–120
Celtuce Mar 7 Mar 28 Apr 11 Aug 11 Jun 13 – Jul 25 60–90
Chard Mar 7 Mar 28 Apr 11 Aug 11 Jun 6 – Jul 25 50–60
Chayote Feb 21 Apr 18 Apr 25 Aug 29 – Nov 7 120–180
Chickpeas Mar 7 Mar 28 Apr 11 Aug 11 Jul 4 – Aug 15 80–110
Chicory Mar 7 Mar 28 Apr 11 Aug 11 Jun 13 – Jul 25 60–85
Chinese Cabbage Mar 7 Mar 28 Apr 11 Aug 11 Jun 6 – Jul 4 50–70
Christmas Lima Beans Feb 21 Apr 18 Apr 25 Jul 18 – Aug 22 80–100
Collard Greens Mar 7 Mar 28 Apr 11 Aug 11 Jun 6 – Aug 8 55–75
Corn Apr 18 Jun 20 – Aug 15 60–100
Cowpeas Apr 18 Jun 20 – Aug 1 60–90
Cress Mar 7 Mar 28 Apr 11 Aug 11 Apr 25 – May 16 14–21
Crookneck Squash Mar 14 Apr 18 Apr 25 Jun 13 – Jul 11 45–60
Crosne Mar 28 Aug 11 Aug 29 – Oct 31 150–200
Cucumber Mar 14 Apr 18 Apr 25 Jun 20 – Aug 15 50–70
Daikon Mar 28 Aug 11 May 23 – Jun 20 50–70
Delicata Squash Mar 14 Apr 18 Apr 25 Jul 18 – Aug 22 80–100
Edamame Apr 18 Jul 4 – Aug 15 75–100
Eggplant Feb 7 Apr 18 Apr 25 Jul 4 – Sep 5 65–85
Endive Mar 7 Mar 28 Apr 11 Aug 11 May 30 – Jul 4 45–65
Escarole Mar 7 Mar 28 Apr 11 Aug 11 Jun 6 – Jul 4 50–70
Fava Beans Mar 7 Mar 28 Apr 11 Aug 11 Jun 27 – Aug 8 75–100
Fennel Feb 21 Apr 18 Apr 25 Jun 27 – Aug 8 60–90
Garlic Sep 8 Dec 8 – Apr 20 90–240
Green Beans Apr 18 Jun 13 – Aug 8 50–65
Horseradish Apr 25 Aug 29 – Nov 7 120–180
Hot Peppers Feb 7 Apr 18 Apr 25 Jul 4 – Oct 10 70–120
Hubbard Squash Mar 14 Apr 18 Apr 25 Aug 8 – Sep 12 100–120
Jicama Feb 21 Apr 18 Apr 25 Aug 29 – Nov 7 120–180
Kabocha Mar 14 Apr 18 Apr 25 Jul 25 – Aug 22 85–100
Kai Lan Mar 7 Mar 28 Apr 11 Aug 11 May 30 – Jun 27 45–60
Kale Mar 7 Mar 28 Apr 11 Aug 11 Jun 6 – Aug 1 50–70
Kidney Beans Apr 18 Jul 18 – Aug 22 85–110
Kohlrabi Mar 7 Mar 28 Apr 11 Aug 11 May 30 – Jul 4 45–65
Komatsuna Mar 7 Mar 28 Apr 11 Aug 11 May 16 – Jun 20 35–50
Leeks Mar 7 Mar 28 Apr 11 Aug 11 Jul 11 – Sep 26 90–150
Lentils Mar 7 Mar 28 Apr 11 Aug 11 Jul 4 – Aug 15 80–110
Lettuce Mar 7 Mar 28 Apr 11 Aug 11 May 16 – Jul 25 30–60
Lima Beans Apr 18 Jun 20 – Aug 1 60–90
Loofah Feb 21 Apr 18 Apr 25 Aug 8 – Oct 10 100–150
Luffa Feb 21 Apr 18 Apr 25 Jul 25 – Oct 10 90–150
Mache Mar 7 Mar 28 Apr 11 Aug 11 May 23 – Jun 27 40–60
Malabar Spinach Feb 21 Apr 18 Apr 25 Jun 20 – Jul 18 55–70
Melon Mar 14 Apr 18 Apr 25 Jul 4 – Aug 22 70–100
Microgreens Mar 7 Mar 28 Apr 11 Aug 11 Apr 18 – May 16 7–21
Mitsuba Mar 7 Mar 28 Apr 4 Aug 11 May 30 – Jul 25 50–70
Mizuna Mar 7 Mar 28 Apr 11 Aug 11 May 16 – Jun 13 30–45
Mustard Greens Mar 7 Mar 28 Apr 11 Aug 11 May 16 – Jul 18 30–50
Napa Cabbage Mar 7 Mar 28 Apr 11 Aug 11 Jun 6 – Jul 11 55–75
New Zealand Spinach Feb 21 Apr 18 Apr 25 Jun 20 – Jul 18 55–70
Okra Feb 21 Apr 18 Apr 25 Jun 20 – Aug 15 50–65
Onion Mar 7 Mar 28 Apr 11 Aug 11 Jul 11 – Aug 29 90–120
Pac Choi Mar 7 Mar 28 Apr 11 Aug 11 May 23 – Jun 20 40–55
Parsnip Mar 28 Aug 11 Jul 11 – Aug 22 100–130
Patty Pan Squash Mar 14 Apr 18 Apr 25 Jun 13 – Jul 11 45–60
Peas Mar 7 Mar 28 Apr 11 Aug 11 Jun 6 – Aug 1 55–70
Peppers Feb 7 Apr 18 Apr 25 Jun 27 – Sep 5 60–90
Pole Beans Feb 21 Apr 18 Apr 25 Jun 20 – Aug 15 55–70
Potatoes Feb 21 Apr 18 Apr 25 Jul 4 – Sep 12 70–120
Pumpkin Mar 14 Apr 18 Apr 25 Jul 25 – Sep 12 85–120
Purslane Mar 7 Mar 28 Apr 11 Aug 11 May 23 – Jun 27 40–60
Radicchio Mar 7 Mar 28 Apr 11 Aug 11 Jun 13 – Jul 18 60–80
Radish Mar 28 Aug 11 Apr 25 – May 16 22–35
Rhubarb May 2 365–730
Romanesco Mar 7 Mar 28 Apr 11 Aug 11 Jun 27 – Aug 8 75–100
Rutabaga Mar 28 Aug 11 Jun 20 – Jul 25 80–100
Salsify Mar 28 Aug 11 Jul 11 – Aug 22 100–130
Savoy Cabbage Mar 7 Mar 28 Apr 11 Aug 11 Jun 20 – Aug 15 70–110
Scallions Mar 7 Mar 28 Apr 11 Aug 11 Jun 6 – Jul 4 50–70
Scarlet Runner Beans Feb 21 Apr 18 Apr 25 Jun 27 – Aug 1 60–80
Shallot Mar 7 Mar 28 Apr 11 Aug 11 Jul 11 – Aug 29 90–120
Shiso Feb 21 Apr 18 Apr 25 Jun 20 – Aug 15 50–70
Snap Peas Feb 21 Apr 18 Apr 25 Jun 20 – Aug 15 55–70
Snow Peas Mar 7 Mar 28 Apr 11 Aug 11 Jun 6 – Aug 1 50–65
Soybeans Apr 18 Jul 11 – Sep 5 80–120
Spaghetti Squash Mar 14 Apr 18 Apr 25 Jul 25 – Aug 22 85–100
Spinach Mar 7 Mar 28 Apr 11 Aug 11 May 16 – Jul 18 35–50
Squash (Summer) Mar 14 Apr 18 Apr 25 Jun 13 – Aug 15 45–65
Squash (Winter) Mar 14 Apr 18 Apr 25 Jul 18 – Sep 12 80–120
Sunchoke Apr 25 Aug 15 – Oct 10 110–150
Sweet Corn Apr 18 Jun 20 – Aug 1 60–90
Sweet Potatoes Feb 21 Apr 18 Apr 25 Jul 25 – Sep 12 90–120
Tatsoi Mar 7 Mar 28 Apr 11 Aug 11 May 16 – Jun 20 35–50
Tomatillo Feb 21 Apr 18 Apr 25 Jun 27 – Sep 5 60–85
Tomatoes Feb 21 Apr 18 Apr 25 Jun 27 – Sep 5 60–85
Turnip Mar 28 Aug 11 May 9 – Jun 13 40–60
Watercress Mar 7 Mar 28 Apr 11 Aug 11 May 23 – Jun 27 40–60
Watermelon Mar 14 Apr 18 Apr 25 Jul 4 – Aug 22 70–100
Wax Beans Apr 18 Jun 13 – Aug 8 50–65
Winter Melon Feb 21 Apr 18 Apr 25 Jul 25 – Sep 12 90–120
Yard Long Beans Feb 21 Apr 18 Apr 25 Jun 20 – Aug 1 55–80
Zucchini Mar 14 Apr 18 Apr 25 Jun 13 – Aug 8 45–60

🍓 Fruits to Grow in Randolph County

31 fruits that grow well in Zone 7a with planting dates for Randolph County.

Show all 31 fruits with planting dates
Plant Start Indoors Direct Sow Transplant Fall Plant Harvest Days to Maturity
Alpine Strawberries May 2 Aug 1 – Nov 14 90–180
Aronia May 2 730–1095
Blackberries May 2 365–730
Blueberries May 2 730–1095
Boysenberries May 2 365–730
Cantaloupe May 2 Jul 11 – Aug 15 70–90
Che Fruit May 2 1095–1825
Cranberries May 2 730–1095
Currants May 2 730–1095
Elderberries May 2 730–1095
Figs May 2 730–1825
Goji Berries May 2 730–1095
Gooseberries May 2 730–1095
Grapes May 2 730–1095
Ground Cherry May 2 Jul 11 – Sep 5 65–80
Hardy Kiwi May 2 1095–1825
Haskaps May 2 730–1095
Honeydew May 2 Jul 25 – Sep 5 80–110
Jostaberry May 2 730–1095
Kiwi May 2 1095–1825
Lingonberries May 2 730–1095
Loquat May 2 730–1825
Medlar May 2 1095–1825
Mulberries May 2 730–1825
Pawpaw May 2 1095–2555
Persimmon May 2 1095–2555
Pomegranate May 2 730–1095
Quince May 2 1095–1825
Raspberries May 2 365–730
Serviceberries May 2 730–1095
Strawberries May 2 Aug 1 – Dec 12 90–365

🌿 Herbs to Grow in Randolph County

36 herbs that grow well in Zone 7a with planting dates for Randolph County.

Show all 36 herbs with planting dates
Plant Start Indoors Direct Sow Transplant Fall Plant Harvest Days to Maturity
Angelica Mar 7 Mar 28 Apr 4 Aug 11 365–730
Anise Mar 7 Mar 28 Apr 4 Aug 11 Jul 4 – Sep 19 90–120
Basil Feb 21 Apr 18 Apr 25 Jun 20 – Aug 22 50–75
Bee Balm Apr 18 Jul 18 – Oct 3 90–120
Borage Mar 7 Mar 28 Apr 4 Aug 11 May 30 – Jul 18 50–60
Caraway Mar 7 Mar 28 Apr 4 Aug 11 365–450
Catnip Apr 18 Jun 20 – Aug 22 60–80
Chamomile Mar 7 Mar 28 Apr 4 Aug 11 Jun 6 – Aug 15 60–90
Chervil Mar 7 Mar 28 Apr 4 Aug 11 May 16 – Jul 18 40–60
Chives Apr 18 Jun 20 – Aug 29 60–90
Cilantro Mar 7 Mar 28 Apr 4 Aug 11 May 16 – Jul 18 40–60
Comfrey Apr 18 Jun 20 – Aug 29 60–90
Cumin Mar 7 Mar 28 Apr 4 Aug 11 Jul 18 – Sep 19 100–120
Dill Mar 7 Mar 28 Apr 4 Aug 11 May 16 – Jul 18 40–60
Epazote Feb 21 Apr 18 Apr 25 Jun 13 – Aug 8 45–60
Fennel (herb) Mar 7 Mar 28 Apr 4 Aug 11 Jun 6 – Aug 15 60–90
Feverfew Apr 18 Jul 18 – Oct 3 90–120
Garlic Chives Apr 18 Jun 20 – Aug 29 60–90
Horehound Apr 18 Jul 4 – Aug 29 75–90
Hyssop Apr 18 Jun 27 – Aug 29 70–90
Lemon Balm Apr 18 Jun 20 – Aug 8 60–70
Lemon Thyme Apr 18 Jun 27 – Aug 29 70–90
Lovage Apr 18 Jun 27 – Aug 29 70–90
Marjoram Apr 18 Jun 20 – Aug 29 60–90
Mint Apr 18 Jun 20 – Aug 29 60–90
Oregano Apr 18 Jun 20 – Aug 29 60–90
Parsley Mar 7 Mar 28 Apr 4 Aug 11 Jun 6 – Aug 8 60–80
Rosemary Apr 18 Jul 11 – Nov 28 80–180
Rue Apr 18 Jun 27 – Aug 29 70–90
Sage Apr 18 Jul 4 – Aug 29 75–90
Savory Apr 18 Jun 13 – Aug 8 50–70
Sorrel Mar 7 Mar 28 Apr 4 Aug 11 May 16 – Jul 18 40–60
Tarragon Apr 18 Jun 20 – Aug 29 60–90
Thai Basil Feb 21 Apr 18 Apr 25 Jun 20 – Aug 22 50–75
Thyme Apr 18 Jun 27 – Aug 29 70–90
Valerian Apr 18 Aug 22 – Nov 28 120–180

🌸 Flowers to Grow in Randolph County

53 flowers that grow well in Zone 7a with planting dates for Randolph County.

Show all 53 flowers with planting dates
Plant Start Indoors Direct Sow Transplant Fall Plant Bloom Days to Maturity
Ageratum Feb 28 Apr 11 Apr 11 Jun 6 – Sep 26 60–75
Alliums Sep 15 Oct 13 – Nov 3 28–42
Anemones Aug 25 Sep 8 – Oct 6 90–120
Astilbe Feb 7 Apr 18 Jun 27 – Aug 22 70–100
Bachelor's Button Feb 28 Mar 7 Apr 11 Aug 25 Jun 13 – Sep 12 60–90
Begonias Jan 31 Apr 11 Jun 20 – Oct 10 70–90
Black-eyed Susan Feb 7 Apr 11 Apr 18 Jun 27 – Oct 31 60–80
Bleeding Hearts Feb 7 Apr 18 Jun 6 – Jul 11 60–90
Calendula Feb 28 Mar 7 Apr 11 Aug 25 May 30 – Sep 12 50–70
California Poppy Mar 14 Aug 25 May 23 – Aug 1 60–90
Celosia Mar 14 Apr 11 Apr 11 Jun 13 – Oct 10 60–90
Columbine Feb 14 Apr 18 Apr 18 Jun 6 – Jul 11 70–100
Coreopsis Feb 7 Apr 11 Apr 18 Jun 20 – Oct 31 60–80
Cosmos Mar 14 Apr 11 Apr 11 Jun 20 – Oct 10 60–90
Crocus Sep 15 Aug 11 – Sep 1 10–20
Daffodils Sep 15 Aug 18 – Sep 8 20–40
Dahlias Mar 14 Apr 18 Apr 18 Jun 27 – Oct 31 70–120
Daylily Feb 7 Apr 18 Jun 27 – Oct 31 60–90
Dianthus Feb 14 Mar 7 Mar 21 May 9 – Aug 8 60–80
Echinacea (Purple Coneflower) Feb 7 Apr 18 Apr 18 Jul 4 – Oct 31 70–90
Foxglove Feb 14 Apr 18 Apr 18 Jun 6 – Jul 11 80–120
Gaillardia (Blanket Flower) Feb 21 Apr 18 Apr 18 Jun 27 – Nov 14 70–100
Geraniums Jan 31 Apr 11 Jun 20 – Oct 10 70–100
Gladiolus Apr 11 Apr 11 Jun 20 – Oct 24 70–100
Hostas Jan 31 Apr 18 Jun 27 – Oct 31 60–90
Hyacinths Sep 15 Sep 8 – Sep 29 14–28
Hydrangeas Jan 31 Apr 18 Jun 27 – Oct 17 90–150
Impatiens Feb 14 Apr 18 Jun 27 – Oct 17 60–75
Irises Division Apr 18 Jun 6 – Jul 11 60–100
Larkspur Mar 14 Aug 11 May 23 – Aug 1 60–90
Lavender Feb 7 Apr 25 Jul 4 – Sep 12 90–120
Lilies Division Apr 18 Jun 27 – Oct 17 70–120
Lobelia Feb 7 Mar 21 May 16 – Aug 8 70–80
Lupine Feb 14 Apr 18 Apr 18 Jun 6 – Jul 11 75–100
Marigolds Feb 28 Apr 11 Apr 11 Jun 6 – Sep 12 50–70
Nasturtium Mar 14 Apr 11 Apr 11 Jun 6 – Oct 10 55–65
Pansy Jan 31 Apr 11 Aug 11 Jun 6 – Aug 15 70–90
Peonies Division Apr 18 Jun 13 – Jul 18 90–120
Petunia Feb 14 Apr 18 Jun 27 – Oct 17 70–90
Phlox Feb 7 Apr 18 Apr 18 Jun 27 – Sep 19 80–110
Portulaca Mar 14 Apr 11 Apr 11 May 30 – Sep 26 50–70
Ranunculus Aug 25 Sep 22 – Oct 20 90–120
Roses Jan 31 Apr 18 Jun 27 – Oct 31 90–180
Salvia Feb 14 Apr 11 Jun 20 – Oct 10 70–90
Sedum (Stonecrop) Feb 7 Apr 18 Aug 8 – Oct 31 60–90
Snapdragon Jan 31 Mar 14 Apr 11 Aug 25 Jun 20 – Sep 12 70–100
Sunflower Mar 21 Apr 11 Apr 11 Jul 4 – Oct 10 70–100
Sweet Alyssum Feb 28 Mar 14 Apr 11 Sep 8 May 23 – Aug 15 45–60
Sweet Pea Mar 7 Aug 25 May 16 – Aug 8 65–85
Tulips Sep 15 Sep 1 – Sep 22 15–30
Vinca (Annual) Jan 31 Apr 11 Jun 20 – Oct 10 70–90
Yarrow Feb 7 Apr 11 Apr 18 Jun 20 – Oct 31 60–90
Zinnia Mar 14 Apr 11 Apr 11 Jun 20 – Oct 10 60–70

Monthly Planting Guide for Randolph County

Gardening Guides & Resources

Helpful guides from The Ultimate Homestead to improve your garden in Randolph County.

Frequently Asked Questions

What planting zone is Randolph County, IL?

Randolph County is in USDA Hardiness Zone 7a. 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 Randolph County, IL?

Based on 30 years of NOAA weather station data, the median last spring frost in Randolph County falls around April 11. Plan transplants and direct-sow dates relative to this date.

When is the first fall frost in Randolph County, IL?

The median first fall frost in Randolph County arrives around October 20. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.

🌱

Your Randolph County Garden Planner — Free

A 22-page printable planner built for Randolph County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

Instant PDF download. No spam, unsubscribe any time.

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The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.

  • Proven pairings for 200+ vegetables, herbs, flowers, and fruits
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Composting Guide for Homesteaders

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates represent 50% probability averages; local conditions vary by elevation and microclimate. Last updated: July 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.