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When to Plant Winter Melon in Navarro County, TX

Navarro County, Texas Zone 8b May

Navarro County, Texas gardeners: here's your May plan

We've pulled the most time-sensitive tasks for Navarro County, Texas this May and put them front and centre. Tackle them in order.

Avg. last frost March 11
Avg. first frost November 14
Soil temp (4") 72°F
Watering Low
Pest pressure High
Daylight 13.6 hrs
A few tasks this May that'll pay off in June
  • First harvests: winter melon

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Winter melon (wax gourd) is a large Asian squash with a waxy white coating that allows long storage. The mild flesh is used in soups and stir-fries.

Navarro County, Texas is in USDA Zone 8b. The average last spring frost is March 11 and the first fall frost is November 14, giving you a growing season of approximately 248 days.

At an elevation of 221 feet, Navarro County receives approximately 70.4 inches of rainfall annually with predominantly clay soil. Summer highs average 93°F, providing good warmth for Winter Melon during the growing season. Clay soil retains moisture well for Winter Melon, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Winter Melon root diseases.

Navarro County, TX (Zone 8b) Long season
248 days
Last Spring Frost March 11
248 growing days
First Fall Frost November 14

Navarro County Soil Profile

Soil Type

Clay

Soil pH

7-7.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (94 days to spare)
Start indoors: Jan 16 Transplant: Mar 20 🍅 Harvest: Jun 19 – Aug 7
Recommended (50%) ✓ Fits season (94 days to spare)
Start indoors: Jan 21 Transplant: Mar 25 🍅 Harvest: Jun 24 – Aug 12
Safe Start (90%) ✓ Fits season (89 days to spare)
Start indoors: Feb 13 Transplant: Apr 17 🍅 Harvest: Jul 17 – Sep 4

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 Navarro County

How your county's soil matches Winter Melon's growing requirements.

Soil pH

Your soil pH (7.0–7.7) is more alkaline than Winter Melon prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

Heavy clay soil (45% clay) in Navarro County compacts easily and drains slowly. Amend with compost and avoid working soil when wet.

Organic Matter

Organic matter is moderate (3.0%). Annual compost additions will help Winter Melon.

How to Plant Winter Melon

1"
Planting Depth
30"
Between Plants
42"
Between Rows

Plant Water Budget

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

Monthly Watering Guide for Winter Melon

Winter Melon needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Winter Melon Needs Rainfall You Supplement Action
Jan 1.8" 0" ❄️ Dormant
Feb 2.6" 0" ❄️ Dormant
Mar 4.3" 4.5" 0" ✅ Rainfall sufficient
Apr 4.3" 8" 0" ✅ Rainfall sufficient
May 4.3" 10.5" 0" ✅ Rainfall sufficient
Jun 4.3" 12.1" 0" ✅ Rainfall sufficient
Jul 4.3" 8.3" 0" ✅ Rainfall sufficient
Aug 4.3" 7.6" 0" ✅ Rainfall sufficient
Sep 4.3" 5.9" 0" ✅ Rainfall sufficient
Oct 4.3" 5" 0" ✅ Rainfall sufficient
Nov 4.3" 2.5" 1.8" 💧 Light watering
Dec 1.7" 0" ❄️ Dormant

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

Winter Melon 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.

Winter Melon needs ~2,074 GDD — county provides 4,898 GDD Excellent fit

Winter Melon Planting Timeline — Navarro County, TX

Winter Melon Planting Calendar

Activity When Date Range
Start Indoors January 21 Jan 21 – Feb 4
Transplant Outdoors March 25 Mar 25 – Apr 8
Direct Sow March 18 Mar 18 – Apr 8
Harvest June 24 Jun 24 – Aug 12

Plant 1" deep · 30" apart · Rows 42" apart

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Natural rainfall sufficient

📅 Days to Maturity

90–120 days

🧪 Soil pH

Needs 6–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 8b

📆 Growing Season

248 days in Navarro County

Growing Tips for Winter Melon in Navarro County

Direct sow Winter Melon outdoors after March 11 in Navarro County when soil has warmed and frost danger has passed.

With Navarro County's clay soil (45% clay), work in 3-4 inches of compost before planting Winter Melon. Avoid tilling when soil is wet to prevent compaction.

Common pests for Winter Melon in this region include squash vine borer and cucumber beetles. Use row covers early in the season and inspect plants weekly.

General growing tips

Start seeds indoors 3-4 weeks early. Provide ample space for sprawling vines. Harvest when the waxy coating develops on the rind. Fruits can weigh 15-30 pounds.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Winter Melon in Navarro County, TX?

Navarro County is in Zone 8b with an average last frost of March 11. Plan your Winter Melon planting based on this frost date — see the calendar above for exact timing.

What planting zone is Navarro County, TX?

Navarro County, Texas is in USDA Hardiness Zone 8b. The average last spring frost is March 11 and first fall frost is November 14.

🌱

Your Navarro County Garden Planner — Free

A 24-page printable planner built for Navarro 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 Navarro 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.