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When to Plant Basil in Bandera County, TX

Bandera County, Texas Zone 8b May

What to do in May

If you only do a handful of things in the garden this May, make it these. They're sequenced around your zone's frost timing.

Avg. last frost March 9
Avg. first frost November 16
Soil temp (4") 59°F
Watering Low
Pest pressure High
Daylight 13.5 hrs
  1. Bring in the basil

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

Get ahead of June
  • First harvests: basil

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Basil is a fragrant warm-season herb essential to Italian and Thai cuisines. It comes in many varieties including sweet, Thai, purple, and lemon types.

Bandera County, Texas is in USDA Zone 8b. The average last spring frost is March 9 and the first fall frost is November 16, giving you a growing season of approximately 252 days.

At an elevation of 4,846 feet, Bandera County receives approximately 53.2 inches of rainfall annually with predominantly loam soil. Summer highs average 94°F, providing good warmth for Basil during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Basil root diseases.

Bandera County, TX (Zone 8b) Long season
252 days
Last Spring Frost March 9
252 growing days
First Fall Frost November 16
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Bandera County Soil Profile

Soil Type

Loam

Soil pH

6.5-7.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (122 days to spare)
Start indoors: Jan 12 Transplant: Mar 16 🍅 Harvest: May 11 – Jul 13
Recommended (50%) ✓ Fits season (119 days to spare)
Start indoors: Jan 19 Transplant: Mar 23 🍅 Harvest: May 18 – Jul 20
Safe Start (90%) ✓ Fits season (108 days to spare)
Start indoors: Feb 17 Transplant: Apr 21 🍅 Harvest: Jun 16 – Aug 18

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 Bandera County

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

Soil pH

Your soil pH (6.5–7.4) overlaps with Basil's range (6.0–7.0), though not a perfect match.

Soil Texture

The loam soil in Bandera County is excellent for Basil — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

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

How to Plant Basil

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

Succession Planting Basil

6
successive plantings in your 252-day season

Sow every 5.7 weeks. Last sowing by Sep 02 to harvest before frost.

Plant Water Budget

Plant needs
0.6″/week
Rainfall provides
0.9″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Basil

Basil needs approximately 0.6 inches of water per week (2.6" per month). Here's how your county's rainfall compares month by month.

Month Basil Needs Rainfall You Supplement Action
Jan 1.3" 0" ❄️ Dormant
Feb 2" 0" ❄️ Dormant
Mar 2.6" 3.2" 0" ✅ Rainfall sufficient
Apr 2.6" 6.1" 0" ✅ Rainfall sufficient
May 2.6" 7.4" 0" ✅ Rainfall sufficient
Jun 2.6" 9" 0" ✅ Rainfall sufficient
Jul 2.6" 7.4" 0" ✅ Rainfall sufficient
Aug 2.6" 5.9" 0" ✅ Rainfall sufficient
Sep 2.6" 4.3" 0" ✅ Rainfall sufficient
Oct 2.6" 3.3" 0" ✅ Rainfall sufficient
Nov 2.6" 1.8" 0.8" 💧 Light watering
Dec 1.3" 0" ❄️ Dormant

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

Basil 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.

Basil needs ~1,281 GDD — county provides 5,166 GDD Excellent fit

Basil Planting Timeline — Bandera County, TX

Basil Planting Calendar

Activity When Date Range
Start Indoors January 19 Jan 19 – Feb 2
Transplant Outdoors March 23 Mar 23 – Apr 6
Direct Sow March 16 Mar 16 – Apr 6
Harvest May 18 May 18 – Jul 20

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

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.6"/week · Natural rainfall sufficient

📅 Days to Maturity

50–75 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 8b

📆 Growing Season

252 days in Bandera County

Growing Tips for Basil in Bandera County

Direct sow Basil outdoors after March 09 in Bandera County when soil has warmed and frost danger has passed.

General growing tips

Start seeds indoors or direct sow after last frost. Pinch flower buds to extend leaf production. Harvest leaves from the top down, cutting just above a leaf pair.

Recommended Basil Varieties for Bandera County

Downy mildew-resistant basil for your humid climate

Prospera (DM-resistant) Amazel Eleonora

Companion Planting

Good Companions

Avoid Planting Near

  • Rue
  • Sage

Check more plant combinations with our Companion Planting Checker →

🌾 Save Your Own Basil Seeds
Life Cycle Annual
Pollination Self-Pollinating
How to Collect Let flower spikes dry brown on the plant.
Storage Store airtight; viable 5 years at 35°F, under 45% humidity.

Isolate 150 ft between varieties. Different basil species can cross.

Frequently Asked Questions

When should I plant Basil in Bandera County, TX?

Bandera County is in Zone 8b with an average last frost of March 9. Plan your Basil planting based on this frost date — see the calendar above for exact timing.

What planting zone is Bandera County, TX?

Bandera County, Texas is in USDA Hardiness Zone 8b. The average last spring frost is March 9 and first fall frost is November 16.

🌱

Your Bandera County Garden Planner — Free

A 24-page printable planner built for Bandera County (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 Bandera County, TX. 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.