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When to Plant Corn in Atoka County, OK

Corn is a warm-season grass grown for its sweet ears, which are best eaten soon after harvest. It is wind-pollinated and must be planted in blocks for good kernel fill.

Atoka County, Oklahoma is in USDA Zone 7b. The average last spring frost is April 4 and the first fall frost is November 1, giving you a growing season of approximately 211 days.

At an elevation of 741 feet, Atoka County receives approximately 30.4 inches of rainfall annually with predominantly loam soil. Summer highs average 94ยฐF, providing good warmth for Corn during the growing season.

Atoka County, OK (Zone 7b) Long season
211 days
Last Spring Frost April 4
211 growing days
First Fall Frost November 1

Atoka County Soil Profile

Soil Type

Loam

Soil pH

6.7-7.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (96 days to spare)
Transplant: Mar 26 🍅 Harvest: May 28 – Jul 23
Recommended (50%) ✓ Fits season (92 days to spare)
Transplant: Apr 4 🍅 Harvest: Jun 6 – Aug 1
Safe Start (90%) ✓ Fits season (100 days to spare)
Transplant: Apr 17 🍅 Harvest: Jun 19 – Aug 14

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

Plant needs
1.0″/week
Rainfall provides
0.6″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 890 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Corn needs ~1,640 GDD — county provides 4,325 GDD Excellent fit

Corn Planting Timeline โ€” Atoka County, OK

Corn Planting Calendar

Activity When Date Range
Direct Sow April 11 Apr 11 โ€“ May 2
Harvest June 13 Jun 13 โ€“ Aug 8

Plant 1" deep ยท 12" apart ยท Rows 36" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Direct Sow
May Direct Sow
June Harvest
July Harvest
August Harvest
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

60โ€“100 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 7b

Growing Season

211 days

Growing Tips for Atoka County

Plant in blocks of at least 4 rows rather than single rows for proper pollination. Direct sow after soil reaches 60F. Side-dress with nitrogen when plants are knee-high.

Companion Planting

Good Companions

Avoid Planting Near

  • Tomatoes
  • Celery

Level Up Your Garden

Frequently Asked Questions

When should I plant Corn in Atoka County, OK?

Atoka County is in Zone 7b with an average last frost of April 4. Plan your Corn planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Atoka County, OK?

Atoka County, Oklahoma is in USDA Hardiness Zone 7b. The average last spring frost is April 4 and first fall frost is November 1.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Atoka County gardeners in Zone 7b organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Atoka County, OK. Local conditions may vary. Last updated: April 2026.