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When to Plant Thai Basil in Avoyelles Parish, LA

Avoyelles Parish, Louisiana Zone 9a May

May in Avoyelles Parish, Louisiana — your action list

Your Avoyelles Parish, Louisiana garden is entering a new phase. Here's what's on the schedule for May and why each task matters now.

Avg. last frost February 25
Avg. first frost November 26
Soil temp (4") 74°F
Watering Low
Pest pressure High
Daylight 13.6 hrs
  1. Collect thai basil at their peak

    This is the payoff month. Bring a basket, bring a friend, and get into the beds.

Looking ahead to June
  • 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.

Avoyelles Parish, Louisiana is in USDA Zone 9a. The average last spring frost is February 25 and the first fall frost is November 26, giving you a growing season of approximately 274 days.

At an elevation of 231 feet, Avoyelles Parish receives approximately 48.2 inches of rainfall annually with predominantly loam soil. Summer highs average 93°F, providing good warmth for Thai Basil during the growing season.

Avoyelles Parish, LA (Zone 9a) Year-round
274 days
Last Spring Frost February 25
274 growing days
First Fall Frost November 26

Avoyelles Parish Soil Profile

Soil Type

Loam

Soil pH

6.3-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (150 days to spare)
Start indoors: Jan 3 Transplant: Feb 21 🍅 Harvest: Apr 18 – Jun 20
Recommended (50%) ✓ Fits season (148 days to spare)
Start indoors: Jan 14 Transplant: Mar 4 🍅 Harvest: Apr 29 – Jul 1
Safe Start (90%) ✓ Fits season (152 days to spare)
Start indoors: Jan 29 Transplant: Mar 19 🍅 Harvest: May 14 – Jul 16

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 Avoyelles Parish

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

Soil pH

Your soil pH (6.3–6.7) is within Thai Basil's preferred range (6.0–7.0).

Soil Texture

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

Organic Matter

Organic matter is moderate (2.9%). 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

6
successive plantings in your 274-day season

Sow every 5.7 weeks. Last sowing by Sep 12 to harvest before frost.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.7″/week
You supply
0.3″/week
Watering frequency Only during dry spells
Season total 646 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 4.3" 0" ❄️ Dormant
Feb 4.3" 4" 0.3" 💧 Light watering
Mar 4.3" 4.7" 0" ✅ Rainfall sufficient
Apr 4.3" 3.8" 0.5" 💧 Light watering
May 4.3" 4" 0.3" 💧 Light watering
Jun 4.3" 4.5" 0" ✅ Rainfall sufficient
Jul 4.3" 4.2" 0.1" 💧 Light watering
Aug 4.3" 4.9" 0" ✅ Rainfall sufficient
Sep 4.3" 3.9" 0.4" 💧 Light watering
Oct 4.3" 2.9" 1.4" 💧 Light watering
Nov 4.3" 3.2" 1.1" 💧 Light watering
Dec 3.8" 0" ❄️ Dormant

Water needs are for active growing months only (Feb–Nov in Avoyelles Parish). 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 ~1,234 GDD — county provides 5,431 GDD Excellent fit

Thai Basil Planting Timeline — Avoyelles Parish, LA

Thai Basil Planting Calendar

Activity When Date Range
Start Indoors January 14 Jan 14 – Jan 28
Transplant Outdoors March 4 Mar 4 – Mar 18
Direct Sow March 4 Mar 4 – Mar 25
Harvest April 29 Apr 29 – Jul 1

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Only during dry spells

📅 Days to Maturity

50–75 days

🧪 Soil pH

Needs 6–7 · Your soil: ideal

🗺️ USDA Zone

Zone 9a

📆 Growing Season

274 days in Avoyelles Parish

Growing Tips for Thai Basil in Avoyelles Parish

Direct sow Thai Basil outdoors after February 25 in Avoyelles Parish when soil has warmed and frost danger has passed.

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 Avoyelles Parish, LA?

Avoyelles Parish is in Zone 9a with an average last frost of February 25. Plan your Thai Basil planting based on this frost date — see the calendar above for exact timing.

What planting zone is Avoyelles Parish, LA?

Avoyelles Parish, Louisiana is in USDA Hardiness Zone 9a. The average last spring frost is February 25 and first fall frost is November 26.

🌱

Your Avoyelles Parish Garden Planner — Free

A 24-page printable planner built for Avoyelles 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.

Instant PDF download. No spam, unsubscribe any time.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Avoyelles Parish, LA. 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.