When to Plant Tomatoes in Franklin County, MS
Tomatoes are the most popular home garden crop, available in thousands of varieties from tiny cherries to massive beefsteaks. They are warm-season plants needing full sun.
Franklin County, Mississippi is in USDA Zone 8a. The average last spring frost is March 12 and the first fall frost is November 13, giving you a growing season of approximately 246 days.
At an elevation of 281 feet, Franklin County receives approximately 54 inches of rainfall annually with predominantly clay loam soil. Summer highs average 93°F, providing good warmth for Tomatoes during the growing season. Clay soil retains moisture well for Tomatoes, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Tomatoes root diseases.
Franklin County Soil Profile
Soil Type
Clay Loam
Soil pH
5.6-6.5
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 Franklin County
How your county's soil matches Tomatoes's growing requirements.
Soil pH
Your soil pH (5.6–6.5) overlaps with Tomatoes's range (6.0–7.0), though not a perfect match.
Soil Texture
The clay loam soil in Franklin County is excellent for Tomatoes — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.2%). Annual compost additions will help Tomatoes.
How to Plant Tomatoes
Succession Planting Tomatoes
Sow every 6.9 weeks. Last sowing by Aug 20 to harvest before frost.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Tomatoes
Tomatoes needs approximately 1.2 inches of water per week (5.2" per month). Here's how your county's rainfall compares month by month.
| Month | Tomatoes Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.7" | 0" | ❄️ Dormant |
| Feb | — | 4.6" | 0" | ❄️ Dormant |
| Mar | 5.2" | 5.1" | 0.1" | 💧 Light watering |
| Apr | 5.2" | 4.2" | 1" | 💧 Light watering |
| May | 5.2" | 4.3" | 0.9" | 💧 Light watering |
| Jun | 5.2" | 4.4" | 0.8" | 💧 Light watering |
| Jul | 5.2" | 5.2" | 0" | ✅ Rainfall sufficient |
| Aug | 5.2" | 4.4" | 0.8" | 💧 Light watering |
| Sep | 5.2" | 4.1" | 1.1" | 💧 Light watering |
| Oct | 5.2" | 3.8" | 1.4" | 💧 Light watering |
| Nov | 5.2" | 4.5" | 0.7" | 💧 Light watering |
| Dec | — | 4.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Franklin County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Tomatoes 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.
Tomatoes Planting Timeline — Franklin County, MS
Tomatoes Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 22 | Jan 22 – Feb 5 |
| Transplant Outdoors | March 26 | Mar 26 – Apr 9 |
| Direct Sow | March 19 | Mar 19 – Apr 9 |
| Harvest | May 28 | May 28 – Aug 6 |
Plant 0.5" deep · 24" apart · Rows 36" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Start Indoors |
| March | Transplant Outdoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.2"/week · 1-2 times/week
📅 Days to Maturity
60–85 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 8a
📆 Growing Season
246 days in Franklin County
Growing Tips for Tomatoes in Franklin County
Direct sow Tomatoes outdoors after March 12 in Franklin County when soil has warmed and frost danger has passed.
With Franklin County's clay soil (32% clay), work in 3-4 inches of compost before planting Tomatoes. Avoid tilling when soil is wet to prevent compaction.
Common pests for Tomatoes in this region include tomato hornworm and aphids. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 6-8 weeks before last frost. Bury transplants deep to encourage rooting along the stem. Provide consistent moisture to prevent blossom end rot and cracking.
Recommended Tomatoes Varieties for Franklin County
Your long season supports large indeterminate heirloom types
Disease-resistant varieties for your humid climate
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Isolate 25 ft between varieties for purity. Use open-pollinated varieties for true-to-type seeds.
Tomatoes in Other Locations
Frequently Asked Questions
When should I plant Tomatoes in Franklin County, MS?
Franklin County is in Zone 8a with an average last frost of March 12. Plan your Tomatoes planting based on this frost date — see the calendar above for exact timing.
What planting zone is Franklin County, MS?
Franklin County, Mississippi is in USDA Hardiness Zone 8a. The average last spring frost is March 12 and first fall frost is November 13.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Franklin County gardeners in Zone 8a organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.