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When to Plant Lavender in Wharton County, TX

Wharton County, Texas Zone 9a May

This month in Wharton County, Texas

Each item below is timed to Wharton County, Texas's frost dates and soil temperatures. Skip nothing, stress about nothing.

Avg. last frost February 17
Avg. first frost December 6
Soil temp (4") 76°F
Watering Low
Pest pressure High
Daylight 13.5 hrs
  1. Collect lavender at their peak

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

Before June arrives, get these ready
  • First harvests: lavender

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Lavender is a fragrant perennial herb with silvery foliage and purple flower spikes. It is prized for its essential oils, culinary uses, and ornamental beauty.

Wharton County, Texas is in USDA Zone 9a. The average last spring frost is February 17 and the first fall frost is December 6, giving you a growing season of approximately 292 days.

At an elevation of 207 feet, Wharton County receives approximately 64.8 inches of rainfall annually with predominantly loam soil. Summer highs average 98°F, so Lavender may need afternoon shade and extra watering during peak heat. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Lavender root diseases.

Wharton County, TX (Zone 9a) Year-round
292 days
Last Spring Frost February 17
292 growing days
First Fall Frost December 6
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Wharton County Soil Profile

Soil Type

Loam

Soil pH

6.6-7.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (43 days to spare)
Transplant: Feb 12 🍅 Harvest: May 14 – Oct 15
Recommended (50%) ✓ Fits season (40 days to spare)
Transplant: Feb 24 🍅 Harvest: May 26 – Oct 27
Safe Start (90%) ✓ Fits season (32 days to spare)
Transplant: Mar 19 🍅 Harvest: Jun 18 – Nov 19

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 Wharton County

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

Soil pH

Your soil pH (6.6–7.7) is within Lavender's preferred range (6.5–8.0).

Soil Texture

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

Organic Matter

Organic matter is moderate (2.4%). Annual compost additions will help Lavender.

How to Plant Lavender

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

Plant Water Budget

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

Monthly Watering Guide for Lavender

Lavender needs approximately 0.3 inches of water per week (1.3" per month). Here's how your county's rainfall compares month by month.

Month Lavender Needs Rainfall You Supplement Action
Jan 1.7" 0" ❄️ Dormant
Feb 1.3" 2.2" 0" ✅ Rainfall sufficient
Mar 1.3" 4.6" 0" ✅ Rainfall sufficient
Apr 1.3" 6.6" 0" ✅ Rainfall sufficient
May 1.3" 9" 0" ✅ Rainfall sufficient
Jun 1.3" 10.4" 0" ✅ Rainfall sufficient
Jul 1.3" 8.4" 0" ✅ Rainfall sufficient
Aug 1.3" 7.4" 0" ✅ Rainfall sufficient
Sep 1.3" 5.7" 0" ✅ Rainfall sufficient
Oct 1.3" 4.4" 0" ✅ Rainfall sufficient
Nov 1.3" 2.4" 0" ✅ Rainfall sufficient
Dec 1.3" 1.9" 0" ✅ Rainfall sufficient

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

Lavender 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.

Lavender needs ~3,408 GDD — county provides 6,885 GDD Excellent fit

Lavender Planting Timeline — Wharton County, TX

Lavender Planting Calendar

Activity When Date Range
Transplant Outdoors February 24 Feb 24 – Mar 10
Harvest May 26 May 26 – Oct 27

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

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.3"/week · Natural rainfall sufficient

📅 Days to Maturity

90–200 days

🧪 Soil pH

Needs 6.5–8 · Your soil: ideal

🗺️ USDA Zone

Zone 9a

📆 Growing Season

292 days in Wharton County

Growing Tips for Lavender in Wharton County

Direct sow Lavender outdoors after February 17 in Wharton County when soil has warmed and frost danger has passed.

With summer highs reaching 98°F in Wharton County, provide afternoon shade for Lavender and water deeply in the morning.

With 65" of annual rainfall in Wharton County, ensure good drainage for Lavender — excess moisture can promote root rot and fungal diseases.

General growing tips

Plant in well-drained, sandy soil. Avoid heavy mulching around the crown. Prune after flowering but do not cut into old wood. Lavender resents wet winter conditions.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Lavender in Wharton County, TX?

Wharton County is in Zone 9a with an average last frost of February 17. Plan your Lavender planting based on this frost date — see the calendar above for exact timing.

What planting zone is Wharton County, TX?

Wharton County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is February 17 and first fall frost is December 6.

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Your Wharton County Garden Planner — Free

A 24-page printable planner built for Wharton 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.

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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 Wharton 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.