Blog

When to Plant Tarragon in Walton County, FL

Walton County, Florida Zone 9a May

This month in Walton County, Florida

A quick May briefing for Walton County, Florida gardeners — what's urgent, what's next, and what can wait.

Avg. last frost March 14
Avg. first frost November 15
Soil temp (4") 74°F
Watering Moderate
Pest pressure High
Daylight 13.5 hrs
  1. Bring in the tarragon

    Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.

June prep starts now
  • First harvests: tarragon

Instant PDF download. No spam, unsubscribe any time.

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.

Walton County, Florida is in USDA Zone 9a. The average last spring frost is March 14 and the first fall frost is November 15, giving you a growing season of approximately 246 days.

At an elevation of 200 feet, Walton County receives approximately 52.8 inches of rainfall annually with predominantly sand soil. Summer highs average 95°F, so Tarragon may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Tarragon will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Tarragon root diseases.

Walton County, FL (Zone 9a) Long season
246 days
Last Spring Frost March 14
246 growing days
First Fall Frost November 15

Walton County Soil Profile

Soil Type

Sand

Soil pH

4.8-6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (108 days to spare)
Transplant: Mar 13 🍅 Harvest: May 15 – Jul 24
Recommended (50%) ✓ Fits season (106 days to spare)
Transplant: Mar 21 🍅 Harvest: May 23 – Aug 1
Safe Start (90%) ✓ Fits season (103 days to spare)
Transplant: Apr 13 🍅 Harvest: Jun 15 – Aug 24

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 Walton County

How your county's soil matches Tarragon's growing requirements.

Soil pH

Your soil pH (4.8–6.0) is more acidic than Tarragon prefers (6.0–7.5). Add garden lime to raise pH.

Soil Texture

Sandy soil in Walton County warms quickly in spring but drains fast. Tarragon will need more frequent watering and regular compost additions to retain nutrients.

Drainage

Drainage is adequate for Tarragon.

Organic Matter

Organic matter is low (1.5%). Add 2-3 inches of compost before planting Tarragon.

How to Plant Tarragon

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

Succession Planting Tarragon

4
successive plantings in your 246-day season

Sow every 6.9 weeks. Last sowing by Aug 17 to harvest before frost.

Plant Water Budget

Plant needs
0.4″/week
Rainfall provides
0.9″/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 2.1" 0" ❄️ Dormant
Feb 2.8" 0" ❄️ Dormant
Mar 1.7" 3.2" 0" ✅ Rainfall sufficient
Apr 1.7" 2.6" 0" ✅ Rainfall sufficient
May 1.7" 3.5" 0" ✅ Rainfall sufficient
Jun 1.7" 7.5" 0" ✅ Rainfall sufficient
Jul 1.7" 8.1" 0" ✅ Rainfall sufficient
Aug 1.7" 7.8" 0" ✅ Rainfall sufficient
Sep 1.7" 6.7" 0" ✅ Rainfall sufficient
Oct 1.7" 4.2" 0" ✅ Rainfall sufficient
Nov 1.7" 2.1" 0" ✅ Rainfall sufficient
Dec 2.3" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Walton County). 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 ~1,594 GDD — county provides 5,227 GDD Excellent fit

Tarragon Planting Timeline — Walton County, FL

Tarragon Planting Calendar

Activity When Date Range
Transplant Outdoors March 21 Mar 21 – Apr 4
Harvest May 23 May 23 – Aug 1

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

Month-by-Month Timeline

MonthActivities
January
February
March Transplant Outdoors
April Transplant Outdoors
May Harvest
June Harvest
July Harvest
August Harvest
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: too_acidic

🗺️ USDA Zone

Zone 9a

📆 Growing Season

246 days in Walton County

Growing Tips for Tarragon in Walton County

Direct sow Tarragon outdoors after March 14 in Walton County when soil has warmed and frost danger has passed.

Sandy soil in Walton County dries quickly — mulch Tarragon with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

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 Walton County, FL?

Walton County is in Zone 9a with an average last frost of March 14. Plan your Tarragon planting based on this frost date — see the calendar above for exact timing.

What planting zone is Walton County, FL?

Walton County, Florida is in USDA Hardiness Zone 9a. The average last spring frost is March 14 and first fall frost is November 15.

🌱

Your Walton County Garden Planner — Free

A 24-page printable planner built for Walton County (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 Walton County, FL. 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.