When to plant Corn in Franklin County, MO
For Corn in Franklin County, the safe spring window opens around April 17 and closes around May 8. Last expected frost is April 10, first fall frost October 27, giving a 200-day growing season.
When to Plant Corn in Franklin County, MO
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.
Franklin County, Missouri is in USDA Zone 6b. The average last spring frost is April 10 and the first fall frost is October 27, giving you a growing season of approximately 200 days.
At an elevation of 1,180 feet, Franklin County receives approximately 38.3 inches of rainfall annually with predominantly silt loam soil. Summer highs average 90°F, providing good warmth for Corn during the growing season.
Franklin County Soil Profile
Soil Type
Silt Loam
Soil pH
5.7-6.8
Drainage
Well Drained
How Much Corn to Grow
For a family of 4, plant approximately 60 corn plants in about 120 sq ft. In Franklin County's 200-day season, you'll have plenty of time for a full harvest. Plan your garden layout →
Monthly Watering Guide for Corn
Corn needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Corn Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.8" | 0" | ❄️ Dormant |
| Feb | — | 1.9" | 0" | ❄️ Dormant |
| Mar | — | 2.6" | 0" | ❄️ Dormant |
| Apr | 4.3" | 4" | 0.3" | 💧 Light watering |
| May | 4.3" | 3.9" | 0.4" | 💧 Light watering |
| Jun | 4.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 4.7" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 3.5" | 0.8" | 💧 Light watering |
| Sep | 4.3" | 3.2" | 1.1" | 💧 Light watering |
| Oct | 4.3" | 3.2" | 1.1" | 💧 Light watering |
| Nov | — | 2.5" | 0" | ❄️ Dormant |
| Dec | — | 2.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Franklin County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Corn Planting Timeline — Franklin County, MO
Corn Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | April 17 | Apr 17 – May 8 |
| Harvest | June 19 | Jun 19 – Aug 14 |
Plant 1" deep · 12" apart · Rows 36" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Direct Sow |
| May | Direct Sow |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
60–100 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 6b
📆 Growing Season
200 days in Franklin County
Growing Tips for Franklin 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
Check more plant combinations with our Companion Planting Checker →
Corn in Other Locations
Frequently Asked Questions
When should I plant Corn in Franklin County, MO?
Franklin County is in Zone 6b with an average last frost of April 10. Plan your Corn planting based on this frost date — see the calendar above for exact timing.
What planting zone is Franklin County, MO?
Franklin County, Missouri is in USDA Hardiness Zone 6b. The average last spring frost is April 10 and first fall frost is October 27.
When should I plant Corn in Franklin County, MO?
In Franklin County, MO, plant Corn after the last frost (around April 10) and before the first frost (around October 27). Best results when soil holds above 50°F.
What growing zone is Franklin County, MO for Corn?
Franklin County sits in USDA Zone 6b. Corn grows reliably in zones 3a through 11b, so it's a good fit here.
Can Corn grow in Franklin County's climate?
Yes — Corn grows well in Franklin County's temperate climate. Franklin County averages a 200-day frost-free season, with last frost around April 10 and first frost around October 27.
Your Franklin County Garden Planner — Free
A 22-page printable planner built for Franklin County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.