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When to Plant Tarragon in Avoyelles Parish, LA

Avoyelles Parish, Louisiana Zone 9a May

What to do in May

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

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. Harvest tarragon as they ripen

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

Looking ahead to June
  • First harvests: tarragon

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French tarragon is a perennial herb with slender leaves and a distinctive anise-like flavor essential in French cooking. It does not produce viable seed and must be propagated vegetatively.

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 Tarragon 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 (136 days to spare)
Transplant: Feb 21 🍅 Harvest: Apr 25 – Jul 4
Recommended (50%) ✓ Fits season (134 days to spare)
Transplant: Mar 4 🍅 Harvest: May 6 – Jul 15
Safe Start (90%) ✓ Fits season (138 days to spare)
Transplant: Mar 19 🍅 Harvest: May 21 – Jul 30

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 Tarragon's growing requirements.

Soil pH

Your soil pH (6.3–6.7) is within Tarragon's preferred range (6.0–7.5).

Soil Texture

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

Organic Matter

Organic matter is moderate (2.9%). Annual compost additions will help Tarragon.

How to Plant Tarragon

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

Succession Planting Tarragon

5
successive plantings in your 274-day season

Sow every 6.9 weeks. Last sowing by Aug 28 to harvest before frost.

Plant Water Budget

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

Monthly Watering Guide for Tarragon

Tarragon needs approximately 0.4 inches of water per week (1.7" per month). Here's how your county's rainfall compares month by month.

Month Tarragon Needs Rainfall You Supplement Action
Jan 4.3" 0" ❄️ Dormant
Feb 1.7" 4" 0" ✅ Rainfall sufficient
Mar 1.7" 4.7" 0" ✅ Rainfall sufficient
Apr 1.7" 3.8" 0" ✅ Rainfall sufficient
May 1.7" 4" 0" ✅ Rainfall sufficient
Jun 1.7" 4.5" 0" ✅ Rainfall sufficient
Jul 1.7" 4.2" 0" ✅ Rainfall sufficient
Aug 1.7" 4.9" 0" ✅ Rainfall sufficient
Sep 1.7" 3.9" 0" ✅ Rainfall sufficient
Oct 1.7" 2.9" 0" ✅ Rainfall sufficient
Nov 1.7" 3.2" 0" ✅ Rainfall sufficient
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.

Tarragon 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.

Tarragon needs ~1,481 GDD — county provides 5,431 GDD Excellent fit

Tarragon Planting Timeline — Avoyelles Parish, LA

Tarragon Planting Calendar

Activity When Date Range
Transplant Outdoors March 4 Mar 4 – Mar 18
Harvest May 6 May 6 – Jul 15

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.4"/week · Natural rainfall sufficient

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 6–7.5 · Your soil: ideal

🗺️ USDA Zone

Zone 9a

📆 Growing Season

274 days in Avoyelles Parish

Growing Tips for Tarragon in Avoyelles Parish

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

Common pests for Tarragon in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.

General growing tips

Purchase plants or divisions as French tarragon does not grow true from seed. Plant in well-drained soil. Divide every 3-4 years to maintain vigor. Harvest tips regularly for best flavor.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Tarragon in Avoyelles Parish, LA?

Avoyelles Parish is in Zone 9a with an average last frost of February 25. Plan your Tarragon 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.

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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 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.