When to Plant Tarragon in Hardin County, TX
May in the garden — Hardin County, Texas
Each item below is timed to Hardin County, Texas's frost dates and soil temperatures. Skip nothing, stress about nothing.
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Bring in the tarragon
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
To set up a strong June, finish these tasks
- First harvests: tarragon
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.
Hardin County, Texas is in USDA Zone 9a. The average last spring frost is February 14 and the first fall frost is December 4, giving you a growing season of approximately 293 days.
At an elevation of 323 feet, Hardin County receives approximately 66.4 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 90°F, providing good warmth for Tarragon during the growing season. 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.
Hardin County Soil Profile
Soil Type
Sandy Loam
Soil pH
5.3-6.7
Drainage
Well Drained
Plant Planting Risk Windows
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 Hardin County
How your county's soil matches Tarragon's growing requirements.
Soil pH
Your soil pH (5.3–6.7) overlaps with Tarragon's range (6.0–7.5), though not a perfect match.
Soil Texture
Sandy soil in Hardin County warms quickly in spring but drains fast. Tarragon will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is low (1.7%). Add 2-3 inches of compost before planting Tarragon.
How to Plant Tarragon
Succession Planting Tarragon
Sow every 6.9 weeks. Last sowing by Sep 05 to harvest before frost.
Plant Water Budget
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 | — | 1.5" | 0" | ❄️ Dormant |
| Feb | 1.7" | 2" | 0" | ✅ Rainfall sufficient |
| Mar | 1.7" | 3.7" | 0" | ✅ Rainfall sufficient |
| Apr | 1.7" | 7.7" | 0" | ✅ Rainfall sufficient |
| May | 1.7" | 10.4" | 0" | ✅ Rainfall sufficient |
| Jun | 1.7" | 11.2" | 0" | ✅ Rainfall sufficient |
| Jul | 1.7" | 9.5" | 0" | ✅ Rainfall sufficient |
| Aug | 1.7" | 7.2" | 0" | ✅ Rainfall sufficient |
| Sep | 1.7" | 5.6" | 0" | ✅ Rainfall sufficient |
| Oct | 1.7" | 4.1" | 0" | ✅ Rainfall sufficient |
| Nov | 1.7" | 1.9" | 0" | ✅ Rainfall sufficient |
| Dec | 1.7" | 1.6" | 0.1" | 💧 Light watering |
Water needs are for active growing months only (Feb–Dec in Hardin 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 Planting Timeline — Hardin County, TX
Tarragon Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | February 21 | Feb 21 – Mar 7 |
| Harvest | April 25 | Apr 25 – Jul 4 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Transplant Outdoors |
| March | Transplant Outdoors |
| April | Harvest |
| 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: acceptable
🗺️ USDA Zone
Zone 9a
📆 Growing Season
293 days in Hardin County
Growing Tips for Tarragon in Hardin County
Direct sow Tarragon outdoors after February 14 in Hardin County when soil has warmed and frost danger has passed.
Sandy soil in Hardin 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.
With 66" of annual rainfall in Hardin County, ensure good drainage for Tarragon — excess moisture can promote root rot and fungal diseases.
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 →
Tarragon in Other Locations
Frequently Asked Questions
When should I plant Tarragon in Hardin County, TX?
Hardin County is in Zone 9a with an average last frost of February 14. Plan your Tarragon planting based on this frost date — see the calendar above for exact timing.
What planting zone is Hardin County, TX?
Hardin County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is February 14 and first fall frost is December 4.
Your Hardin County Garden Planner — Free
A 24-page printable planner built for Hardin 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.