When to Plant Zucchini in Fulton County, IL
Zucchini is an incredibly prolific summer squash that can produce an abundance of fruit from just a few plants. It is versatile in the kitchen from grilling to baking.
Fulton County, Illinois is in USDA Zone 5b. The average last spring frost is April 20 and the first fall frost is October 16, giving you a growing season of approximately 179 days.
At an elevation of 1,162 feet, Fulton County receives approximately 39.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Zucchini to ensure they mature before fall.
Fulton County Soil Profile
Soil Type
Silt Loam
Soil pH
6.1-6.7
Drainage
Well Drained
Plant Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Plant Water Budget
Zucchini Planting Timeline — Fulton County, IL
Zucchini Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 16 | Mar 16 – Mar 30 |
| Transplant Outdoors | May 4 | May 4 – May 18 |
| Direct Sow | April 27 | Apr 27 – May 18 |
| Harvest | June 22 | Jun 22 – Aug 17 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
45–60 days
Soil pH
6 – 7.5
USDA Zone
Zone 5b
Growing Season
179 days
Growing Tips for Fulton County
Direct sow after last frost. Harvest when fruits are 6-8 inches long for best flavor and texture. Check plants daily in summer as fruits can double in size overnight.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Zucchini in Other Locations
Frequently Asked Questions
When should I plant Zucchini in Fulton County, IL?
Fulton County is in Zone 5b with an average last frost of April 20. Plan your Zucchini planting based on this frost date — see the calendar above for exact timing.
What planting zone is Fulton County, IL?
Fulton County, Illinois is in USDA Hardiness Zone 5b. The average last spring frost is April 20 and first fall frost is October 16.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Fulton County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.
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