When to Plant Sweet Corn in USDA Zone 7b
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.
In Zone 7b, the average last spring frost is around March 18 and the first fall frost is around November 8, giving you a growing season of approximately 235 days.
Sweet Corn Planting Timeline — Zone 7b
Where Is USDA Zone 7b?
The map below highlights the states that contain Zone 7b. Click any state to see the Sweet Corn planting schedule for that location.
Sweet Corn Planting Calendar — Zone 7b
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | March 25 | Mar 25 – Apr 15 |
| Harvest | May 27 | May 27 – Jul 8 |
Plant 1" deep · 12" apart · Rows 36" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Direct Sow |
| April | Direct Sow |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Free Zone 7b Planting Calendar PDF
Know exactly when to plant every crop in your zone. Get a printable month-by-month calendar customized for Zone 7b with start dates, transplant windows, and harvest times.
Growing Conditions
Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
Days to Maturity
60–90 days
Soil pH
6 – 7
Zone Temperature Range
5°F to 10°F average annual minimum
Growing Season
235 days (Zone 7b average)
Planting Specifications
| Planting Depth | 1 inches |
| Plant Spacing | 12 inches apart |
| Row Spacing | 36 inches between rows |
Succession Planting Sweet Corn in Zone 7b
Sow every 6.9 weeks for continuous harvest throughout the season.
Growing Tips for Sweet Corn in Zone 7b
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
Saving Sweet Corn Seeds
Recommended for Your Garden
Start seeds indoors with reusable cell trays and humidity domes.
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Keep your garden organized with durable, weather-resistant plant labels.
Related Plants
Sweet Corn in Other Zones
Sweet Corn by State
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Frequently Asked Questions
When should I plant Sweet Corn in Zone 7b?
In Zone 7b, plan your Sweet Corn planting around the average last frost date of March 18. Direct sow outdoors around March 25.
Can Sweet Corn grow in Zone 7b?
Yes, Sweet Corn can grow well in Zone 7b, hardy in USDA zones 3a through 11b. Zone 7b has a growing season of approximately 235 days, which is sufficient for Sweet Corn (60-90 days to maturity).
When can I harvest Sweet Corn in Zone 7b?
In Zone 7b, expect to harvest Sweet Corn from May 27 – July 8. Sweet Corn takes 60-90 days from planting to harvest.
What is the last frost date for Zone 7b?
The average last spring frost in Zone 7b is around March 18, and the first fall frost is around November 8. This gives a growing season of approximately 235 days. These are 50% probability dates — actual frost dates vary year to year.
What should I plant next to Sweet Corn?
Good companion plants for Sweet Corn include Squash Summer, Green Beans, Cucumber. These companions can help with pest control, pollination, and nutrient sharing.
Plan Your Garden with Confidence
Get our free Garden Planner — organize your planting dates for Zone 7b, track your crops, and plan your garden season from seed to harvest.
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