When to Plant Sweet Corn in Iberville Parish, LA
Iberville Parish, Louisiana gardeners: here's your May plan
Your Iberville Parish, Louisiana garden is entering a new phase. Here's what's on the schedule for May and why each task matters now.
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Pick sweet corn
Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.
Before June arrives, get these ready
- First harvests: sweet corn
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.
Iberville Parish, Louisiana is in USDA Zone 9a. The average last spring frost is February 14 and the first fall frost is December 5, giving you a growing season of approximately 294 days.
At an elevation of 464 feet, Iberville Parish receives approximately 59 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 103°F, so Sweet Corn may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Sweet Corn will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Sweet Corn root diseases.
Iberville Parish Soil Profile
Soil Type
Sandy Loam
Soil pH
4.8-6.2
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 Iberville Parish
How your county's soil matches Sweet Corn's growing requirements.
Soil pH
Your soil pH (4.8–6.2) is more acidic than Sweet Corn prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in Iberville Parish warms quickly in spring but drains fast. Sweet Corn will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Sweet Corn.
Organic Matter
Organic matter is low (1.7%). Add 2-3 inches of compost before planting Sweet Corn.
How to Plant Sweet Corn
Succession Planting Sweet Corn
Sow every 6.9 weeks. Last sowing by Sep 06 to harvest before frost.
Plant Water Budget
Monthly Watering Guide for Sweet Corn
Sweet 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 | Sweet Corn Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.2" | 0" | ❄️ Dormant |
| Feb | 6.5" | 4.9" | 1.6" | 💧 Light watering |
| Mar | 6.5" | 6" | 0.5" | 💧 Light watering |
| Apr | 6.5" | 4.6" | 1.9" | 💧 Light watering |
| May | 6.5" | 5.1" | 1.4" | 💧 Light watering |
| Jun | 6.5" | 4.5" | 2" | 💧 Light watering |
| Jul | 6.5" | 5.6" | 0.9" | 💧 Light watering |
| Aug | 6.5" | 5.8" | 0.7" | 💧 Light watering |
| Sep | 6.5" | 4.9" | 1.6" | 💧 Light watering |
| Oct | 6.5" | 4" | 2.5" | 💧 Light watering |
| Nov | 6.5" | 3.9" | 2.6" | 💧 Light watering |
| Dec | 6.5" | 5.3" | 1.2" | 💧 Light watering |
Water needs are for active growing months only (Feb–Dec in Iberville Parish). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Sweet 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.
Sweet Corn Planting Timeline — Iberville Parish, LA
Sweet Corn Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | February 21 | Feb 21 – Mar 14 |
| Harvest | April 25 | Apr 25 – Jun 6 |
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
60–90 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9a
📆 Growing Season
294 days in Iberville Parish
Growing Tips for Sweet Corn in Iberville Parish
Direct sow Sweet Corn outdoors after February 14 in Iberville Parish when soil has warmed and frost danger has passed.
Sandy soil in Iberville Parish dries quickly — mulch Sweet Corn with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 103°F in Iberville Parish, provide afternoon shade for Sweet Corn and water deeply in the morning.
Common pests for Sweet 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 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
Check more plant combinations with our Companion Planting Checker →
Sweet Corn in Other Locations
Frequently Asked Questions
When should I plant Sweet Corn in Iberville Parish, LA?
Iberville Parish is in Zone 9a with an average last frost of February 14. Plan your Sweet Corn planting based on this frost date — see the calendar above for exact timing.
What planting zone is Iberville Parish, LA?
Iberville Parish, Louisiana is in USDA Hardiness Zone 9a. The average last spring frost is February 14 and first fall frost is December 5.
Your Iberville Parish Garden Planner — Free
A 24-page printable planner built for Iberville Parish (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.