When to Plant Corn in Glynn County, GA
Your May planting checklist for Glynn County, Georgia
May rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Glynn County, Georgia.
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Collect corn at their peak
If you can't use it all right away, check the food-preservation section of your planner.
A few tasks this May that'll pay off in June
- First harvests: corn
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.
Glynn County, Georgia is in USDA Zone 9a. The average last spring frost is February 9 and the first fall frost is December 13, giving you a growing season of approximately 307 days.
At an elevation of 135 feet, Glynn County receives approximately 55.3 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 97°F, so Corn may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Corn will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Corn root diseases.
Glynn County Soil Profile
Soil Type
Sandy Loam
Soil pH
4.9-6.2
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.
Soil Compatibility in Glynn County
How your county's soil matches Corn's growing requirements.
Soil pH
Your soil pH (4.9–6.2) is more acidic than Corn prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in Glynn County warms quickly in spring but drains fast. Corn will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Corn.
Organic Matter
Organic matter is low (1.8%). Add 2-3 inches of compost before planting Corn.
How to Plant Corn
Succession Planting Corn
Sow every 6.9 weeks. Last sowing by Sep 04 to harvest before frost.
Plant Water Budget
Monthly Watering Guide for Corn
Corn needs approximately 1.5 inches of water per week (6.5" per month). Here's how your county's rainfall compares month by month.
| Month | Corn Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.4" | 0" | ❄️ Dormant |
| Feb | 6.5" | 3.9" | 2.6" | 💧 Light watering |
| Mar | 6.5" | 4.6" | 1.9" | 💧 Light watering |
| Apr | 6.5" | 4.7" | 1.8" | 💧 Light watering |
| May | 6.5" | 3.9" | 2.6" | 💧 Light watering |
| Jun | 6.5" | 5.5" | 1" | 💧 Light watering |
| Jul | 6.5" | 5.2" | 1.3" | 💧 Light watering |
| Aug | 6.5" | 5.8" | 0.7" | 💧 Light watering |
| Sep | 6.5" | 4.8" | 1.7" | 💧 Light watering |
| Oct | 6.5" | 3.6" | 2.9" | 💧 Light watering |
| Nov | 6.5" | 4.2" | 2.3" | 💧 Light watering |
| Dec | 6.5" | 4.7" | 1.8" | 💧 Light watering |
Water needs are for active growing months only (Feb–Dec in Glynn County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Corn Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Corn Planting Timeline — Glynn County, GA
Corn Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | February 16 | Feb 16 – Mar 9 |
| Harvest | April 20 | Apr 20 – Jun 15 |
Plant 1" deep · 12" apart · Rows 36" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Direct Sow |
| March | Direct Sow |
| April | Harvest |
| May | Harvest |
| June | Harvest |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.5"/week · Only during dry spells
📅 Days to Maturity
60–100 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9a
📆 Growing Season
307 days in Glynn County
Growing Tips for Corn in Glynn County
Direct sow Corn outdoors after February 09 in Glynn County when soil has warmed and frost danger has passed.
Sandy soil in Glynn County dries quickly — mulch Corn with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 97°F in Glynn County, provide afternoon shade for Corn and water deeply in the morning.
Common pests for Corn in this region include corn earworm and corn borers. Use row covers early in the season and inspect plants weekly.
General growing tips
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.
Recommended Corn Varieties for Glynn County
Heat-tolerant varieties that silk well in high temps
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Corn in Other Locations
Frequently Asked Questions
When should I plant Corn in Glynn County, GA?
Glynn County is in Zone 9a with an average last frost of February 9. Plan your Corn planting based on this frost date — see the calendar above for exact timing.
What planting zone is Glynn County, GA?
Glynn County, Georgia is in USDA Hardiness Zone 9a. The average last spring frost is February 9 and first fall frost is December 13.
Your Glynn County Garden Planner — Free
A 24-page printable planner built for Glynn County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.