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When to Plant Tomatoes in Chickasaw County, MS

Chickasaw County, Mississippi Zone 8a May

What to do in May

May rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Chickasaw County, Mississippi.

Avg. last frost March 25
Avg. first frost November 3
Soil temp (4") 68°F
Watering Low
Pest pressure Moderate
Daylight 13.8 hrs
  1. Sow tomatoes in trays indoors

    Give them 6–8 weeks indoors before the last frost and you'll transplant into warm soil with seedlings that are already leaping.

June will be here before you know it — start on
  • First harvests: tomatoes

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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.

Chickasaw County, Mississippi is in USDA Zone 8a. The average last spring frost is March 25 and the first fall frost is November 3, giving you a growing season of approximately 223 days.

At an elevation of 79 feet, Chickasaw County receives approximately 58.3 inches of rainfall annually with predominantly clay loam soil. Summer highs average 91°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.

Chickasaw County, MS (Zone 8a) Long season
223 days
Last Spring Frost March 25
223 growing days
First Fall Frost November 3

Chickasaw County Soil Profile

Soil Type

Clay Loam

Soil pH

5.7-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (79 days to spare)
Start indoors: Jan 26 Transplant: Mar 30 🍅 Harvest: Jun 1 – Aug 10
Recommended (50%) ✓ Fits season (76 days to spare)
Start indoors: Feb 4 Transplant: Apr 8 🍅 Harvest: Jun 10 – Aug 19
Safe Start (90%) ✓ Fits season (76 days to spare)
Start indoors: Feb 25 Transplant: Apr 29 🍅 Harvest: Jul 1 – Sep 9

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 Chickasaw County

How your county's soil matches Tomatoes's growing requirements.

Soil pH

Your soil pH (5.7–6.7) overlaps with Tomatoes's range (6.0–7.0), though not a perfect match.

Soil Texture

The clay loam soil in Chickasaw County is excellent for Tomatoes — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.5%). Annual compost additions will help Tomatoes.

How to Plant Tomatoes

0.5"
Planting Depth
24"
Between Plants
36"
Between Rows

Succession Planting Tomatoes

4
successive plantings in your 223-day season

Sow every 6.9 weeks. Last sowing by Aug 10 to harvest before frost.

Plant Water Budget

Plant needs
1.2″/week
Rainfall provides
1.1″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 202 gal / 100 sq ft

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 5.5" 0" ❄️ Dormant
Feb 5.1" 0" ❄️ Dormant
Mar 5.2" 5.1" 0.1" 💧 Light watering
Apr 5.2" 4.6" 0.6" 💧 Light watering
May 5.2" 4.6" 0.6" 💧 Light watering
Jun 5.2" 5.6" 0" ✅ Rainfall sufficient
Jul 5.2" 5.3" 0" ✅ Rainfall sufficient
Aug 5.2" 6" 0" ✅ Rainfall sufficient
Sep 5.2" 4.7" 0.5" 💧 Light watering
Oct 5.2" 3.2" 2" 💧 Light watering
Nov 5.2" 4.6" 0.6" 💧 Light watering
Dec 4.1" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Chickasaw 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 needs ~1,323 GDD — county provides 4,069 GDD Excellent fit

Tomatoes Planting Timeline — Chickasaw County, MS

Tomatoes Planting Calendar

Activity When Date Range
Start Indoors February 4 Feb 4 – Feb 18
Transplant Outdoors April 8 Apr 8 – Apr 22
Direct Sow April 1 Apr 1 – Apr 22
Harvest June 10 Jun 10 – Aug 19

Plant 0.5" deep · 24" apart · Rows 36" apart

Month-by-Month Timeline

MonthActivities
January
February Start Indoors
March
April Transplant Outdoors Direct Sow
May
June Harvest
July Harvest
August Harvest
September
October
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1.2"/week · Only during dry spells

📅 Days to Maturity

60–85 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 8a

📆 Growing Season

223 days in Chickasaw County

Growing Tips for Tomatoes in Chickasaw County

Direct sow Tomatoes outdoors after March 25 in Chickasaw County when soil has warmed and frost danger has passed.

With Chickasaw County's clay soil (33% 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 Chickasaw County

Disease-resistant varieties for your humid climate

Mountain Merit (VF) Defiant (LB) Iron Lady (EB/LB/SF)

Companion Planting

Good Companions

Avoid Planting Near

  • Cabbage
  • Fennel
  • Potatoes

Check more plant combinations with our Companion Planting Checker →

🌾 Save Your Own Tomatoes Seeds
Life Cycle Annual
Pollination Self-Pollinating
How to Collect Scoop seeds from ripe fruit; ferment 2-3 days to remove gel coating.
Storage Store airtight; viable 4-6 years at 35°F, under 45% humidity.

Isolate 25 ft between varieties for purity. Use open-pollinated varieties for true-to-type seeds.

Frequently Asked Questions

When should I plant Tomatoes in Chickasaw County, MS?

Chickasaw County is in Zone 8a with an average last frost of March 25. Plan your Tomatoes planting based on this frost date — see the calendar above for exact timing.

What planting zone is Chickasaw County, MS?

Chickasaw County, Mississippi is in USDA Hardiness Zone 8a. The average last spring frost is March 25 and first fall frost is November 3.

🌱

Your Chickasaw County Garden Planner — Free

A 24-page printable planner built for Chickasaw County (Zone 8a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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 Chickasaw County, MS. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.