When to Plant Sweet Corn in Oscoda County, MI
Sweet corn is bred for high sugar content in its kernels, which convert to starch rapidly after harvest. Modern supersweet varieties hold their sweetness longer.
Oscoda County, Michigan is in USDA Zone 4b. The average last spring frost is May 20 and the first fall frost is September 30, giving you a growing season of approximately 133 days.
At an elevation of 765 feet, Oscoda County receives approximately 41 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Sweet Corn to ensure they mature before fall.
Oscoda County Soil Profile
Soil Type
Silt Loam
Soil pH
6.2-7.2
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
Sweet Corn Planting Timeline — Oscoda County, MI
Sweet Corn Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | June 3 | Jun 3 – Jun 24 |
| Harvest | August 5 | Aug 5 – Sep 16 |
Plant 1" deep · 12" apart · Rows 36" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | — |
| June | Direct Sow |
| July | — |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
60–90 days
Soil pH
6 – 7
USDA Zone
Zone 4b
Growing Season
133 days
Growing Tips for Oscoda County
Plant in blocks of at least 4 rows for wind pollination. Direct sow after soil is warm. Isolate supersweet varieties from other corn types to prevent cross-pollination.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Sweet Corn in Other Locations
Frequently Asked Questions
When should I plant Sweet Corn in Oscoda County, MI?
Oscoda County is in Zone 4b with an average last frost of May 20. Plan your Sweet Corn planting based on this frost date — see the calendar above for exact timing.
What planting zone is Oscoda County, MI?
Oscoda County, Michigan is in USDA Hardiness Zone 4b. The average last spring frost is May 20 and first fall frost is September 30.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Oscoda County gardeners in Zone 4b organize planting dates, track what's growing, and never miss a planting window.
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