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When to Plant Lemon Verbena in Jackson Parish, LA

Jackson Parish, Louisiana Zone 8b May

May in Jackson Parish, Louisiana — your action list

Each item below is timed to Jackson Parish, Louisiana's frost dates and soil temperatures. Skip nothing, stress about nothing.

Avg. last frost March 20
Avg. first frost November 9
Soil temp (4") 73°F
Watering Low
Pest pressure High
Daylight 13.7 hrs
  1. Begin indoor sowing: lemon verbena

    Your window is short. These crops want several weeks of indoor growth before they go outside.

To set up a strong June, finish these tasks
  • First harvests: lemon verbena

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Lemon verbena is a deciduous shrub with intensely lemon-scented leaves that retain their aroma when dried. It makes an exceptional tea and adds citrus flavor to dishes.

Jackson Parish, Louisiana is in USDA Zone 8b. The average last spring frost is March 20 and the first fall frost is November 9, giving you a growing season of approximately 234 days.

At an elevation of 141 feet, Jackson Parish receives approximately 51.9 inches of rainfall annually with predominantly loam soil. Summer highs average 93°F, providing good warmth for Lemon Verbena during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Lemon Verbena root diseases.

Jackson Parish, LA (Zone 8b) Long season
234 days
Last Spring Frost March 20
234 growing days
First Fall Frost November 9
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Jackson Parish Soil Profile

Soil Type

Loam

Soil pH

6-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (88 days to spare)
Start indoors: Jan 20 Transplant: Mar 24 🍅 Harvest: May 26 – Aug 4
Recommended (50%) ✓ Fits season (87 days to spare)
Start indoors: Jan 30 Transplant: Apr 3 🍅 Harvest: Jun 5 – Aug 14
Safe Start (90%) ✓ Fits season (78 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 Jackson Parish

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

Soil pH

Your soil pH (6.0–6.8) is within Lemon Verbena's preferred range (6.0–7.0).

Soil Texture

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

Organic Matter

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

How to Plant Lemon Verbena

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

Succession Planting Lemon Verbena

4
successive plantings in your 234-day season

Sow every 6.9 weeks. Last sowing by Aug 11 to harvest before frost.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.9″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 171 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Lemon Verbena

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

Month Lemon Verbena Needs Rainfall You Supplement Action
Jan 4.2" 0" ❄️ Dormant
Feb 4.1" 0" ❄️ Dormant
Mar 4.3" 4.8" 0" ✅ Rainfall sufficient
Apr 4.3" 4.4" 0" ✅ Rainfall sufficient
May 4.3" 4.2" 0.1" 💧 Light watering
Jun 4.3" 4.5" 0" ✅ Rainfall sufficient
Jul 4.3" 5.9" 0" ✅ Rainfall sufficient
Aug 4.3" 4.4" 0" ✅ Rainfall sufficient
Sep 4.3" 3.9" 0.4" 💧 Light watering
Oct 4.3" 3.3" 1" 💧 Light watering
Nov 4.3" 4" 0.3" 💧 Light watering
Dec 4.4" 0" ❄️ Dormant

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

Lemon Verbena 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 Verbena needs ~1,481 GDD — county provides 4,621 GDD Excellent fit

Lemon Verbena Planting Timeline — Jackson Parish, LA

Lemon Verbena Planting Calendar

Activity When Date Range
Start Indoors January 30 Jan 30 – Feb 13
Transplant Outdoors April 3 Apr 3 – Apr 17
Direct Sow March 27 Mar 27 – Apr 17
Harvest June 5 Jun 5 – Aug 14

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

Month-by-Month Timeline

MonthActivities
January Start Indoors
February Start Indoors
March Direct Sow
April Transplant Outdoors Direct Sow
May
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 · Only during dry spells

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 6–7 · Your soil: ideal

🗺️ USDA Zone

Zone 8b

📆 Growing Season

234 days in Jackson Parish

Growing Tips for Lemon Verbena in Jackson Parish

Direct sow Lemon Verbena outdoors after March 20 in Jackson Parish when soil has warmed and frost danger has passed.

General growing tips

Grow in a container in cold climates and bring indoors for winter. Prune back hard in spring. Harvest leaves anytime but flavor peaks just before flowering. Dries well for tea.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Lemon Verbena in Jackson Parish, LA?

Jackson Parish is in Zone 8b with an average last frost of March 20. Plan your Lemon Verbena planting based on this frost date — see the calendar above for exact timing.

What planting zone is Jackson Parish, LA?

Jackson Parish, Louisiana is in USDA Hardiness Zone 8b. The average last spring frost is March 20 and first fall frost is November 9.

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Your Jackson Parish Garden Planner — Free

A 24-page printable planner built for Jackson Parish (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 Jackson 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.