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When to Plant Lemon Thyme in Concordia Parish, LA

Concordia Parish, Louisiana Zone 9a May

Your May planting checklist for Concordia Parish, Louisiana

We've pulled the most time-sensitive tasks for Concordia Parish, Louisiana this May and put them front and centre. Tackle them in order.

Avg. last frost March 8
Avg. first frost November 15
Soil temp (4") 74°F
Watering Low
Pest pressure High
Daylight 13.6 hrs
  1. Pick lemon thyme

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

June prep starts now
  • First harvests: lemon thyme

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Lemon thyme is a low-growing perennial herb with tiny, citrus-scented leaves. It combines the savory quality of thyme with a bright lemon flavor, excellent with fish and poultry.

Concordia Parish, Louisiana is in USDA Zone 9a. The average last spring frost is March 8 and the first fall frost is November 15, giving you a growing season of approximately 252 days.

At an elevation of 377 feet, Concordia Parish receives approximately 60.5 inches of rainfall annually with predominantly loam soil. Summer highs average 92°F, providing good warmth for Lemon Thyme during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Lemon Thyme root diseases.

Concordia Parish, LA (Zone 9a) Long season
252 days
Last Spring Frost March 8
252 growing days
First Fall Frost November 15
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Concordia Parish Soil Profile

Soil Type

Loam

Soil pH

6-7.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (109 days to spare)
Transplant: Mar 8 🍅 Harvest: May 17 – Jul 19
Recommended (50%) ✓ Fits season (112 days to spare)
Transplant: Mar 15 🍅 Harvest: May 24 – Jul 26
Safe Start (90%) ✓ Fits season (111 days to spare)
Transplant: Apr 2 🍅 Harvest: Jun 11 – Aug 13

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 Concordia Parish

How your county's soil matches Lemon Thyme's growing requirements.

Soil pH

Your soil pH (6.0–7.3) is within Lemon Thyme's preferred range (6.0–8.0).

Soil Texture

The loam soil in Concordia Parish is excellent for Lemon Thyme — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.2%). Annual compost additions will help Lemon Thyme.

How to Plant Lemon Thyme

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

Succession Planting Lemon Thyme

4
successive plantings in your 252-day season

Sow every 8 weeks. Last sowing by Aug 17 to harvest before frost.

Plant Water Budget

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

Monthly Watering Guide for Lemon Thyme

Lemon Thyme needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.

Month Lemon Thyme Needs Rainfall You Supplement Action
Jan 5.1" 0" ❄️ Dormant
Feb 5.6" 0" ❄️ Dormant
Mar 2.2" 5.9" 0" ✅ Rainfall sufficient
Apr 2.2" 5.1" 0" ✅ Rainfall sufficient
May 2.2" 5.2" 0" ✅ Rainfall sufficient
Jun 2.2" 4.7" 0" ✅ Rainfall sufficient
Jul 2.2" 5.8" 0" ✅ Rainfall sufficient
Aug 2.2" 6.1" 0" ✅ Rainfall sufficient
Sep 2.2" 4.4" 0" ✅ Rainfall sufficient
Oct 2.2" 3.4" 0" ✅ Rainfall sufficient
Nov 2.2" 5" 0" ✅ Rainfall sufficient
Dec 4.2" 0" ❄️ Dormant

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

Lemon Thyme 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.

Lemon Thyme needs ~1,520 GDD — county provides 4,788 GDD Excellent fit

Lemon Thyme Planting Timeline — Concordia Parish, LA

Lemon Thyme Planting Calendar

Activity When Date Range
Transplant Outdoors March 15 Mar 15 – Mar 29
Harvest May 24 May 24 – Jul 26

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

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.5"/week · Natural rainfall sufficient

📅 Days to Maturity

70–90 days

🧪 Soil pH

Needs 6–8 · Your soil: ideal

🗺️ USDA Zone

Zone 9a

📆 Growing Season

252 days in Concordia Parish

Growing Tips for Lemon Thyme in Concordia Parish

Direct sow Lemon Thyme outdoors after March 08 in Concordia Parish when soil has warmed and frost danger has passed.

General growing tips

Start from cuttings or divisions. Plant in well-drained soil. Trim back after flowering. Use as a fragrant ground cover or edging plant along garden paths.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Lemon Thyme in Concordia Parish, LA?

Concordia Parish is in Zone 9a with an average last frost of March 8. Plan your Lemon Thyme planting based on this frost date — see the calendar above for exact timing.

What planting zone is Concordia Parish, LA?

Concordia Parish, Louisiana is in USDA Hardiness Zone 9a. The average last spring frost is March 8 and first fall frost is November 15.

🌱

Your Concordia Parish Garden Planner — Free

A 24-page printable planner built for Concordia 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.

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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 Concordia 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.