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When to Plant Thai Basil in Leake County, MS

Leake County, Mississippi Zone 8b May

What to do in May

We've pulled the most time-sensitive tasks for Leake County, Mississippi this May and put them front and centre. Tackle them in order.

Avg. last frost March 22
Avg. first frost November 6
Soil temp (4") 73°F
Watering Low
Pest pressure High
Daylight 13.7 hrs
  1. Sow thai basil in trays indoors

    These need a head start before your last frost (March 22). Sow into cells now so you're ready to transplant in a few weeks.

  2. Harvest thai basil as they ripen

    Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.

To set up a strong June, finish these tasks
  • First harvests: thai basil

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Thai basil has a distinctive anise-licorice flavor with sturdy purple stems and small leaves. It is essential in Thai, Vietnamese, and other Southeast Asian cuisines.

Leake County, Mississippi is in USDA Zone 8b. The average last spring frost is March 22 and the first fall frost is November 6, giving you a growing season of approximately 229 days.

At an elevation of 243 feet, Leake County receives approximately 59.2 inches of rainfall annually with predominantly clay loam soil. Summer highs average 92°F, providing good warmth for Thai Basil during the growing season. Clay soil retains moisture well for Thai Basil, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Thai Basil root diseases.

Leake County, MS (Zone 8b) Long season
229 days
Last Spring Frost March 22
229 growing days
First Fall Frost November 6
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Leake County Soil Profile

Soil Type

Clay Loam

Soil pH

5.6-6.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (97 days to spare)
Start indoors: Jan 25 Transplant: Mar 29 🍅 Harvest: May 24 – Jul 26
Recommended (50%) ✓ Fits season (96 days to spare)
Start indoors: Feb 1 Transplant: Apr 5 🍅 Harvest: May 31 – Aug 2
Safe Start (90%) ✓ Fits season (92 days to spare)
Start indoors: Feb 25 Transplant: Apr 29 🍅 Harvest: Jun 24 – Aug 26

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 Leake County

How your county's soil matches Thai Basil's growing requirements.

Soil pH

Your soil pH (5.6–6.3) is more acidic than Thai Basil prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

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

Organic Matter

Organic matter is moderate (2.8%). Annual compost additions will help Thai Basil.

How to Plant Thai Basil

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Succession Planting Thai Basil

5
successive plantings in your 229-day season

Sow every 5.7 weeks. Last sowing by Aug 23 to harvest before frost.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
1.1″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

Monthly Watering Guide for Thai Basil

Thai Basil needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Thai Basil Needs Rainfall You Supplement Action
Jan 5.2" 0" ❄️ Dormant
Feb 5.4" 0" ❄️ Dormant
Mar 4.3" 6.6" 0" ✅ Rainfall sufficient
Apr 4.3" 3.9" 0.4" 💧 Light watering
May 4.3" 4.8" 0" ✅ Rainfall sufficient
Jun 4.3" 5" 0" ✅ Rainfall sufficient
Jul 4.3" 5.4" 0" ✅ Rainfall sufficient
Aug 4.3" 5.6" 0" ✅ Rainfall sufficient
Sep 4.3" 4.8" 0" ✅ Rainfall sufficient
Oct 4.3" 3.6" 0.7" 💧 Light watering
Nov 4.3" 4.9" 0" ✅ Rainfall sufficient
Dec 4.1" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Leake County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Thai Basil 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.

Thai Basil needs ~1,188 GDD — county provides 4,351 GDD Excellent fit

Thai Basil Planting Timeline — Leake County, MS

Thai Basil Planting Calendar

Activity When Date Range
Start Indoors February 1 Feb 1 – Feb 15
Transplant Outdoors April 5 Apr 5 – Apr 19
Direct Sow March 29 Mar 29 – Apr 19
Harvest May 31 May 31 – Aug 2

Plant 0.5" deep · 8" apart · Rows 12" apart

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Natural rainfall sufficient

📅 Days to Maturity

50–75 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 8b

📆 Growing Season

229 days in Leake County

Growing Tips for Thai Basil in Leake County

Direct sow Thai Basil outdoors after March 22 in Leake County when soil has warmed and frost danger has passed.

With Leake County's clay soil (34% clay), work in 3-4 inches of compost before planting Thai Basil. Avoid tilling when soil is wet to prevent compaction.

General growing tips

Start seeds indoors or direct sow after last frost. Thai basil holds up better to heat in cooking than sweet basil. Pinch flowers to prolong leaf production.

Companion Planting

Good Companions

Avoid Planting Near

  • Rue
  • Sage

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Thai Basil in Leake County, MS?

Leake County is in Zone 8b with an average last frost of March 22. Plan your Thai Basil planting based on this frost date — see the calendar above for exact timing.

What planting zone is Leake County, MS?

Leake County, Mississippi is in USDA Hardiness Zone 8b. The average last spring frost is March 22 and first fall frost is November 6.

🌱

Your Leake County Garden Planner — Free

A 24-page printable planner built for Leake County (Zone 8b). 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 Leake 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.