Ogle County, IL — Planting Guide
Ogle County is in USDA Zone 5b. The average last spring frost is April 23 and the first fall frost is October 13, giving you a growing season of approximately 173 days.
At an elevation of 890 ft, Ogle County receives approximately 39.8 in of rainfall annually. Summer highs average 85°F with winter lows around 10°F. The predominant soil type is Silt Loam.
🌡️ Zone
5b (-15°F to -10°F min)
❄️ Last Frost
April 23
🍂 First Frost
October 13
📅 Growing Season
173 days
⛰️ Elevation
890 ft
🌧️ Annual Rainfall
39.8 in
Ogle County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Soil & Growing Conditions in Ogle County
Soil Type
Silt Loam
Ideal for most crops — holds moisture and nutrients while draining well.
Watering Needs
Moderate rainfall (39.8 in.) — plan to water 1–2 times per week during the growing season.
Season Tips
173-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.
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.
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 Ogle County
105 vegetables that grow well in Zone 5b with planting dates for Ogle County.
Show all 105 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Mar 19 | Apr 30 | May 7 | — | Jul 30 – Sep 3 | 80–100 |
| Amaranth | Feb 26 | Apr 30 | May 7 | — | Aug 6 – Sep 24 | 90–120 |
| Arugula | Mar 19 | Apr 9 | Apr 23 | Aug 4 | May 28 – Jul 30 | 30–50 |
| Asparagus | — | — | May 7 | — | — | 730–1095 |
| Beets | — | Apr 9 | — | Aug 4 | Jun 4 – Jul 2 | 50–70 |
| Belgian Endive | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Aug 13 – Oct 8 | 110–150 |
| Bitter Melon | Feb 26 | Apr 30 | May 7 | — | Jul 9 – Aug 20 | 60–90 |
| Black Beans | — | Apr 30 | — | — | Jul 30 – Sep 17 | 90–120 |
| Bok Choy | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 4 – Jul 9 | 40–60 |
| Broccoli | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 25 – Aug 6 | 60–90 |
| Broccoli Rabe | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 4 – Jul 9 | 40–60 |
| Brussels Sprouts | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jul 23 – Sep 17 | 90–130 |
| Butternut Squash | Mar 19 | Apr 30 | May 7 | — | Aug 6 – Sep 10 | 85–110 |
| Cabbage | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 25 – Aug 20 | 60–100 |
| Calabash | Feb 26 | Apr 30 | May 7 | — | Jul 30 – Sep 24 | 80–120 |
| Carrots | — | Apr 9 | — | Aug 4 | Jun 11 – Jul 16 | 60–80 |
| Cauliflower | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 18 – Aug 20 | 55–100 |
| Celeriac | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Aug 6 – Sep 10 | 100–120 |
| Celery | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jul 16 – Sep 10 | 80–120 |
| Celtuce | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 25 – Aug 6 | 60–90 |
| Chard | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 18 – Aug 6 | 50–60 |
| Chickpeas | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jul 16 – Aug 27 | 80–110 |
| Chicory | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 25 – Aug 6 | 60–85 |
| Chinese Cabbage | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 18 – Jul 16 | 50–70 |
| Christmas Lima Beans | Feb 26 | Apr 30 | May 7 | — | Jul 30 – Sep 3 | 80–100 |
| Collard Greens | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 18 – Aug 20 | 55–75 |
| Corn | — | Apr 30 | — | — | Jul 2 – Aug 27 | 60–100 |
| Cowpeas | — | Apr 30 | — | — | Jul 2 – Aug 13 | 60–90 |
| Cress | Mar 19 | Apr 9 | Apr 23 | Aug 4 | May 7 – May 28 | 14–21 |
| Crookneck Squash | Mar 19 | Apr 30 | May 7 | — | Jun 25 – Jul 23 | 45–60 |
| Crosne | — | Apr 9 | — | Aug 4 | Sep 10 – Sep 24 | 150–200 |
| Cucumber | Mar 19 | Apr 30 | May 7 | — | Jul 2 – Aug 27 | 50–70 |
| Daikon | — | Apr 9 | — | Aug 4 | Jun 4 – Jul 2 | 50–70 |
| Delicata Squash | Mar 19 | Apr 30 | May 7 | — | Jul 30 – Sep 3 | 80–100 |
| Edamame | — | Apr 30 | — | — | Jul 16 – Aug 27 | 75–100 |
| Eggplant | Feb 12 | Apr 30 | May 7 | — | Jul 16 – Sep 17 | 65–85 |
| Endive | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 11 – Jul 16 | 45–65 |
| Escarole | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 18 – Jul 16 | 50–70 |
| Fava Beans | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jul 9 – Aug 20 | 75–100 |
| Fennel | Feb 26 | Apr 30 | May 7 | — | Jul 9 – Aug 20 | 60–90 |
| Garlic | — | — | — | Sep 1 | Dec 1 – Feb 16 | 90–240 |
| Green Beans | — | Apr 30 | — | — | Jun 25 – Aug 20 | 50–65 |
| Horseradish | — | — | May 7 | — | Sep 10 – Oct 22 | 120–180 |
| Hot Peppers | Feb 12 | Apr 30 | May 7 | — | Jul 16 – Oct 22 | 70–120 |
| Hubbard Squash | Mar 19 | Apr 30 | May 7 | — | Aug 20 – Sep 24 | 100–120 |
| Kabocha | Mar 19 | Apr 30 | May 7 | — | Aug 6 – Sep 3 | 85–100 |
| Kai Lan | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 11 – Jul 9 | 45–60 |
| Kale | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 18 – Aug 13 | 50–70 |
| Kidney Beans | — | Apr 30 | — | — | Jul 30 – Sep 3 | 85–110 |
| Kohlrabi | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 11 – Jul 16 | 45–65 |
| Komatsuna | Mar 19 | Apr 9 | Apr 23 | Aug 4 | May 28 – Jul 2 | 35–50 |
| Leeks | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jul 23 – Oct 8 | 90–150 |
| Lentils | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jul 16 – Aug 27 | 80–110 |
| Lettuce | Mar 19 | Apr 9 | Apr 23 | Aug 4 | May 28 – Aug 6 | 30–60 |
| Lima Beans | — | Apr 30 | — | — | Jul 2 – Aug 13 | 60–90 |
| Mache | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 4 – Jul 9 | 40–60 |
| Melon | Mar 19 | Apr 30 | May 7 | — | Jul 16 – Sep 3 | 70–100 |
| Microgreens | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Apr 30 – May 28 | 7–21 |
| Mitsuba | Mar 19 | Apr 9 | Apr 16 | Aug 4 | Jun 11 – Aug 6 | 50–70 |
| Mizuna | Mar 19 | Apr 9 | Apr 23 | Aug 4 | May 28 – Jun 25 | 30–45 |
| Mustard Greens | Mar 19 | Apr 9 | Apr 23 | Aug 4 | May 28 – Jul 30 | 30–50 |
| Napa Cabbage | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 18 – Jul 23 | 55–75 |
| New Zealand Spinach | Feb 26 | Apr 30 | May 7 | — | Jul 2 – Jul 30 | 55–70 |
| Okra | Feb 26 | Apr 30 | May 7 | — | Jul 2 – Aug 27 | 50–65 |
| Onion | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jul 23 – Sep 10 | 90–120 |
| Pac Choi | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 4 – Jul 2 | 40–55 |
| Parsnip | — | Apr 9 | — | Aug 4 | Jul 23 – Sep 3 | 100–130 |
| Patty Pan Squash | Mar 19 | Apr 30 | May 7 | — | Jun 25 – Jul 23 | 45–60 |
| Peas | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 18 – Aug 13 | 55–70 |
| Peppers | Feb 12 | Apr 30 | May 7 | — | Jul 9 – Sep 17 | 60–90 |
| Pole Beans | Feb 26 | Apr 30 | May 7 | — | Jul 2 – Aug 27 | 55–70 |
| Potatoes | Feb 26 | Apr 30 | May 7 | — | Jul 16 – Sep 24 | 70–120 |
| Pumpkin | Mar 19 | Apr 30 | May 7 | — | Aug 6 – Sep 24 | 85–120 |
| Purslane | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 4 – Jul 9 | 40–60 |
| Radicchio | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 25 – Jul 30 | 60–80 |
| Radish | — | Apr 9 | — | Aug 4 | May 7 – May 28 | 22–35 |
| Rhubarb | — | — | May 14 | — | — | 365–730 |
| Romanesco | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jul 9 – Aug 20 | 75–100 |
| Rutabaga | — | Apr 9 | — | Aug 4 | Jul 2 – Aug 6 | 80–100 |
| Salsify | — | Apr 9 | — | Aug 4 | Jul 23 – Sep 3 | 100–130 |
| Savoy Cabbage | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jul 2 – Aug 27 | 70–110 |
| Scallions | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 18 – Jul 16 | 50–70 |
| Scarlet Runner Beans | Feb 26 | Apr 30 | May 7 | — | Jul 9 – Aug 13 | 60–80 |
| Shallot | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jul 23 – Sep 10 | 90–120 |
| Shiso | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Aug 27 | 50–70 |
| Snap Peas | Feb 26 | Apr 30 | May 7 | — | Jul 2 – Aug 27 | 55–70 |
| Snow Peas | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 18 – Aug 13 | 50–65 |
| Soybeans | — | Apr 30 | — | — | Jul 23 – Sep 17 | 80–120 |
| Spaghetti Squash | Mar 19 | Apr 30 | May 7 | — | Aug 6 – Sep 3 | 85–100 |
| Spinach | Mar 19 | Apr 9 | Apr 23 | Aug 4 | May 28 – Jul 30 | 35–50 |
| Squash (Summer) | Mar 19 | Apr 30 | May 7 | — | Jun 25 – Aug 27 | 45–65 |
| Squash (Winter) | Mar 19 | Apr 30 | May 7 | — | Jul 30 – Sep 24 | 80–120 |
| Sunchoke | — | — | May 7 | — | Aug 27 – Oct 22 | 110–150 |
| Sweet Corn | — | Apr 30 | — | — | Jul 2 – Aug 13 | 60–90 |
| Sweet Potatoes | Feb 26 | Apr 30 | May 7 | — | Aug 6 – Sep 24 | 90–120 |
| Tatsoi | Mar 19 | Apr 9 | Apr 23 | Aug 4 | May 28 – Jul 2 | 35–50 |
| Tomatillo | Feb 26 | Apr 30 | May 7 | — | Jul 9 – Sep 17 | 60–85 |
| Tomatoes | Feb 26 | Apr 30 | May 7 | — | Jul 9 – Sep 17 | 60–85 |
| Turnip | — | Apr 9 | — | Aug 4 | May 21 – Jun 25 | 40–60 |
| Watercress | Mar 19 | Apr 9 | Apr 23 | Aug 4 | Jun 4 – Jul 9 | 40–60 |
| Watermelon | Mar 19 | Apr 30 | May 7 | — | Jul 16 – Sep 3 | 70–100 |
| Wax Beans | — | Apr 30 | — | — | Jun 25 – Aug 20 | 50–65 |
| Winter Melon | Feb 26 | Apr 30 | May 7 | — | Aug 6 – Sep 24 | 90–120 |
| Yard Long Beans | Feb 26 | Apr 30 | May 7 | — | Jul 2 – Aug 13 | 55–80 |
| Zucchini | Mar 19 | Apr 30 | May 7 | — | Jun 25 – Aug 20 | 45–60 |
🍓 Fruits to Grow in Ogle County
27 fruits that grow well in Zone 5b with planting dates for Ogle County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 14 | — | Aug 13 – Oct 29 | 90–180 |
| Aronia | — | — | May 14 | — | — | 730–1095 |
| Blackberries | — | — | May 14 | — | — | 365–730 |
| Blueberries | — | — | May 14 | — | — | 730–1095 |
| Boysenberries | — | — | May 14 | — | — | 365–730 |
| Cantaloupe | — | — | May 14 | — | Jul 23 – Aug 27 | 70–90 |
| Che Fruit | — | — | May 14 | — | — | 1095–1825 |
| Cranberries | — | — | May 14 | — | — | 730–1095 |
| Currants | — | — | May 14 | — | — | 730–1095 |
| Elderberries | — | — | May 14 | — | — | 730–1095 |
| Goji Berries | — | — | May 14 | — | — | 730–1095 |
| Gooseberries | — | — | May 14 | — | — | 730–1095 |
| Grapes | — | — | May 14 | — | — | 730–1095 |
| Ground Cherry | — | — | May 14 | — | Jul 23 – Sep 17 | 65–80 |
| Hardy Kiwi | — | — | May 14 | — | — | 1095–1825 |
| Haskaps | — | — | May 14 | — | — | 730–1095 |
| Honeydew | — | — | May 14 | — | Aug 6 – Sep 17 | 80–110 |
| Jostaberry | — | — | May 14 | — | — | 730–1095 |
| Lingonberries | — | — | May 14 | — | — | 730–1095 |
| Medlar | — | — | May 14 | — | — | 1095–1825 |
| Mulberries | — | — | May 14 | — | — | 730–1825 |
| Pawpaw | — | — | May 14 | — | — | 1095–2555 |
| Persimmon | — | — | May 14 | — | — | 1095–2555 |
| Quince | — | — | May 14 | — | — | 1095–1825 |
| Raspberries | — | — | May 14 | — | — | 365–730 |
| Serviceberries | — | — | May 14 | — | — | 730–1095 |
| Strawberries | — | — | May 14 | — | Aug 13 – Oct 29 | 90–365 |
🌿 Herbs to Grow in Ogle County
34 herbs that grow well in Zone 5b with planting dates for Ogle County.
Show all 34 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Mar 19 | Apr 9 | Apr 16 | Aug 4 | — | 365–730 |
| Anise | Mar 19 | Apr 9 | Apr 16 | Aug 4 | Jul 16 – Oct 1 | 90–120 |
| Basil | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Sep 3 | 50–75 |
| Bee Balm | — | — | Apr 30 | — | Jul 30 – Oct 15 | 90–120 |
| Borage | Mar 19 | Apr 9 | Apr 16 | Aug 4 | Jun 11 – Jul 30 | 50–60 |
| Caraway | Mar 19 | Apr 9 | Apr 16 | Aug 4 | — | 365–450 |
| Catnip | — | — | Apr 30 | — | Jul 2 – Sep 3 | 60–80 |
| Chamomile | Mar 19 | Apr 9 | Apr 16 | Aug 4 | Jun 18 – Aug 27 | 60–90 |
| Chervil | Mar 19 | Apr 9 | Apr 16 | Aug 4 | May 28 – Jul 30 | 40–60 |
| Chives | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Cilantro | Mar 19 | Apr 9 | Apr 16 | Aug 4 | May 28 – Jul 30 | 40–60 |
| Comfrey | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Cumin | Mar 19 | Apr 9 | Apr 16 | Aug 4 | Jul 30 – Oct 1 | 100–120 |
| Dill | Mar 19 | Apr 9 | Apr 16 | Aug 4 | May 28 – Jul 30 | 40–60 |
| Epazote | Mar 5 | Apr 30 | May 7 | — | Jun 25 – Aug 20 | 45–60 |
| Fennel (herb) | Mar 19 | Apr 9 | Apr 16 | Aug 4 | Jun 18 – Aug 27 | 60–90 |
| Feverfew | — | — | Apr 30 | — | Jul 30 – Oct 15 | 90–120 |
| Garlic Chives | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Horehound | — | — | Apr 30 | — | Jul 16 – Sep 10 | 75–90 |
| Hyssop | — | — | Apr 30 | — | Jul 9 – Sep 10 | 70–90 |
| Lemon Balm | — | — | Apr 30 | — | Jul 2 – Aug 20 | 60–70 |
| Lemon Thyme | — | — | Apr 30 | — | Jul 9 – Sep 10 | 70–90 |
| Lovage | — | — | Apr 30 | — | Jul 9 – Sep 10 | 70–90 |
| Mint | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Oregano | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Parsley | Mar 19 | Apr 9 | Apr 16 | Aug 4 | Jun 18 – Aug 20 | 60–80 |
| Rue | — | — | Apr 30 | — | Jul 9 – Sep 10 | 70–90 |
| Sage | — | — | Apr 30 | — | Jul 16 – Sep 10 | 75–90 |
| Savory | — | — | Apr 30 | — | Jun 25 – Aug 20 | 50–70 |
| Sorrel | Mar 19 | Apr 9 | Apr 16 | Aug 4 | May 28 – Jul 30 | 40–60 |
| Tarragon | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Thai Basil | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Sep 3 | 50–75 |
| Thyme | — | — | Apr 30 | — | Jul 9 – Sep 10 | 70–90 |
| Valerian | — | — | Apr 30 | — | Sep 3 – Oct 15 | 120–180 |
🌸 Flowers to Grow in Ogle County
51 flowers that grow well in Zone 5b with planting dates for Ogle County.
Show all 51 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 5 | Apr 30 | Apr 30 | — | Jun 25 – Sep 24 | 60–75 |
| Alliums | — | — | — | Sep 1 | Oct 6 – Oct 27 | 28–42 |
| Anemones | Mar 26 | — | Apr 23 | — | May 28 – Jun 25 | 90–120 |
| Astilbe | Feb 19 | — | May 7 | — | Jul 23 – Oct 1 | 70–100 |
| Bachelor's Button | Mar 12 | Apr 2 | Apr 23 | — | Jun 25 – Sep 10 | 60–90 |
| Begonias | Feb 12 | — | Apr 30 | — | Jul 9 – Oct 1 | 70–90 |
| Black-eyed Susan | Feb 19 | Apr 23 | May 7 | — | Jul 23 – Oct 29 | 60–80 |
| Bleeding Hearts | Feb 19 | — | May 7 | — | Jul 2 – Aug 13 | 60–90 |
| Calendula | Mar 12 | Apr 2 | Apr 23 | — | Jun 11 – Sep 10 | 50–70 |
| Celosia | Mar 19 | Apr 30 | Apr 30 | — | Jul 2 – Oct 8 | 60–90 |
| Columbine | Feb 19 | May 7 | May 7 | — | Jul 2 – Aug 13 | 70–100 |
| Coreopsis | Feb 19 | Apr 30 | May 7 | — | Jul 16 – Oct 29 | 60–80 |
| Cosmos | Mar 26 | Apr 23 | Apr 23 | — | Jul 2 – Oct 1 | 60–90 |
| Crocus | — | — | — | Sep 1 | Jul 14 – Aug 4 | 10–20 |
| Daffodils | — | — | — | Sep 1 | Jul 21 – Aug 11 | 20–40 |
| Dahlias | Mar 26 | Apr 30 | Apr 30 | — | Jul 23 – Oct 22 | 70–120 |
| Daylily | Feb 19 | — | May 7 | — | Jul 30 – Oct 29 | 60–90 |
| Dianthus | Feb 19 | Mar 26 | Apr 9 | — | May 28 – Aug 20 | 60–80 |
| Echinacea (Purple Coneflower) | Feb 19 | May 7 | May 7 | — | Jul 30 – Oct 29 | 70–90 |
| Foxglove | Feb 19 | May 7 | May 7 | — | Jul 2 – Aug 13 | 80–120 |
| Gaillardia (Blanket Flower) | Feb 26 | Apr 30 | Apr 30 | — | Jul 9 – Oct 29 | 70–100 |
| Geraniums | Feb 12 | — | Apr 30 | — | Jul 9 – Oct 1 | 70–100 |
| Gladiolus | — | Apr 30 | Apr 30 | — | Jul 23 – Oct 22 | 70–100 |
| Hostas | Feb 12 | — | May 7 | — | Jul 30 – Oct 29 | 60–90 |
| Hyacinths | — | — | — | Sep 1 | Aug 11 – Sep 8 | 14–28 |
| Hydrangeas | Feb 12 | — | May 7 | — | Jul 23 – Oct 15 | 90–150 |
| Impatiens | Feb 26 | — | Apr 30 | — | Jul 9 – Oct 8 | 60–75 |
| Irises | — | Division | May 7 | — | Jul 2 – Aug 6 | 60–100 |
| Larkspur | — | Mar 26 | — | — | Jun 4 – Jul 30 | 60–90 |
| Lavender | Feb 12 | — | May 14 | — | Jul 23 – Sep 10 | 90–120 |
| Lilies | — | Division | May 7 | — | Jul 16 – Oct 15 | 70–120 |
| Lobelia | Feb 12 | — | Apr 16 | — | Jun 11 – Aug 27 | 70–80 |
| Lupine | Feb 19 | May 7 | May 7 | — | Jul 2 – Aug 13 | 75–100 |
| Marigolds | Mar 12 | Apr 30 | Apr 30 | — | Jun 25 – Sep 24 | 50–70 |
| Nasturtium | Mar 26 | Apr 30 | Apr 30 | — | Jun 25 – Oct 8 | 55–65 |
| Pansy | Feb 12 | — | Apr 23 | — | Jun 18 – Aug 20 | 70–90 |
| Peonies | — | Division | May 7 | — | Jul 16 – Aug 27 | 90–120 |
| Petunia | Feb 26 | — | Apr 30 | — | Jul 9 – Oct 8 | 70–90 |
| Phlox | Feb 19 | May 7 | May 7 | — | Jul 23 – Oct 15 | 80–110 |
| Portulaca | Mar 19 | Apr 30 | Apr 30 | — | Jun 18 – Sep 24 | 50–70 |
| Roses | Feb 12 | — | May 7 | — | Jul 23 – Oct 29 | 90–180 |
| Salvia | Feb 19 | — | Apr 30 | — | Jul 9 – Oct 8 | 70–90 |
| Sedum (Stonecrop) | Feb 19 | — | May 7 | — | Sep 3 – Nov 12 | 60–90 |
| Snapdragon | Feb 12 | Apr 9 | Apr 23 | — | Jul 2 – Sep 10 | 70–100 |
| Sunflower | Apr 2 | Apr 30 | Apr 30 | — | Jul 23 – Oct 8 | 70–100 |
| Sweet Alyssum | Mar 5 | Apr 9 | Apr 23 | — | Jun 4 – Aug 13 | 45–60 |
| Sweet Pea | Mar 12 | Mar 19 | Apr 23 | — | Jul 9 – Sep 10 | 65–85 |
| Tulips | — | — | — | Sep 1 | Aug 4 – Aug 25 | 15–30 |
| Vinca (Annual) | Feb 5 | — | Apr 30 | — | Jul 9 – Oct 1 | 70–90 |
| Yarrow | Feb 19 | Apr 23 | May 7 | — | Jul 16 – Oct 29 | 60–90 |
| Zinnia | Mar 26 | Apr 30 | Apr 30 | — | Jul 9 – Oct 8 | 60–70 |
Monthly Planting Guide for Ogle County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Ogle County.
Frequently Asked Questions
What planting zone is Ogle County, IL?
Ogle County is in USDA Hardiness Zone 5b. 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 Ogle County, IL?
Based on 30 years of NOAA weather station data, the median last spring frost in Ogle County falls around April 23. Plan transplants and direct-sow dates relative to this date.
When is the first fall frost in Ogle County, IL?
The median first fall frost in Ogle County arrives around October 13. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
Your Ogle County Garden Planner — Free
A 22-page printable planner built for Ogle County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.
The Gardener's Encyclopedia to Companion Planting
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
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Seed Saving & Storage Guide
Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.
- 200 plants, step-by-step: life cycle, pollination type, isolation
- Exact temperature + humidity ranges that keep seeds viable
- Bonus: searchable Google Sheets tracker + custom GPT assistant
Composting Guide for Homesteaders
Turn kitchen scraps and yard waste into compost that actually feeds the garden — instead of a pile that smells, attracts pests, and never breaks down.
- 14 sections on composting methods, soil science, and troubleshooting
- The 7-step hot-compost system from start to finish
- Bonus tools: troubleshooting chart, safety guide, monitoring log