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When to Plant Butternut Squash in Kendall County, TX

Kendall County, Texas Zone 8b June

This month in Kendall County, Texas

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

Avg. last frost March 9
Avg. first frost November 20
Soil temp (4") 77°F
Watering Low
Pest pressure High
Daylight 13.9 hrs

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Butternut squash is a popular winter squash with a long neck, small seed cavity, and sweet, nutty orange flesh. It stores exceptionally well for months.

Kendall County, Texas is in USDA Zone 8b. The average last spring frost is March 9 and the first fall frost is November 20, giving you a growing season of approximately 256 days.

At an elevation of 2,187 feet, Kendall County receives approximately 54.6 inches of rainfall annually with predominantly loam soil. Summer highs average 95°F, so Butternut Squash may need afternoon shade and extra watering during peak heat. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Butternut Squash root diseases.

Kendall County, TX (Zone 8b) Long season
256 days
Last Spring Frost March 9
256 growing days
First Fall Frost November 20

Kendall County Soil Profile

Soil Type

Loam

Soil pH

6.4-7.4

Drainage

Well Drained

Butternut Squash Planting Risk Windows

Early Start (70% safe) ✓ Fits season (117 days to spare)
Start indoors: Jan 31 Transplant: Mar 14 🍅 Harvest: Jun 13 – Jul 18
Recommended (50%) ✓ Fits season (116 days to spare)
Start indoors: Feb 9 Transplant: Mar 23 🍅 Harvest: Jun 22 – Jul 27
Safe Start (90%) ✓ Fits season (108 days to spare)
Start indoors: Mar 10 Transplant: Apr 21 🍅 Harvest: Jul 21 – Aug 25

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 Kendall County

How your county's soil matches Butternut Squash's growing requirements.

Soil pH

Your soil pH (6.4–7.4) overlaps with Butternut Squash's range (6.0–7.0), though not a perfect match.

Soil Texture

The loam soil in Kendall County is excellent for Butternut Squash — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.1%). Annual compost additions will help Butternut Squash.

How to Plant Butternut Squash

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

Butternut Squash Water Budget

Plant needs
1.1″/week
Rainfall provides
0.9″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 465 gal / 100 sq ft

Monthly Watering Guide for Butternut Squash

Butternut Squash needs approximately 1.1 inches of water per week (4.8" per month). Here's how your county's rainfall compares month by month.

Month Butternut Squash Needs Rainfall You Supplement Action
Jan 1.5" 0" ❄️ Dormant
Feb 2.2" 0" ❄️ Dormant
Mar 4.8" 3.3" 1.5" 💧 Light watering
Apr 4.8" 6.5" 0" ✅ Rainfall sufficient
May 4.8" 7.6" 0" ✅ Rainfall sufficient
Jun 4.8" 8.2" 0" ✅ Rainfall sufficient
Jul 4.8" 6.9" 0" ✅ Rainfall sufficient
Aug 4.8" 6.3" 0" ✅ Rainfall sufficient
Sep 4.8" 5.4" 0" ✅ Rainfall sufficient
Oct 4.8" 3.4" 1.4" 💧 Light watering
Nov 4.8" 1.9" 2.9" 🚿 Regular watering
Dec 1.3" 0" ❄️ Dormant

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

Butternut Squash 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.

Butternut Squash needs ~2,072 GDD — county provides 5,440 GDD Excellent fit

Butternut Squash Planting Timeline — Kendall County, TX

Butternut Squash Planting Calendar

Activity When Date Range
Start Indoors February 9 Feb 9 – Feb 23
Transplant Outdoors March 23 Mar 23 – Apr 6
Direct Sow March 16 Mar 16 – Apr 6
Harvest June 22 Jun 22 – Jul 27

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1.1"/week · Only during dry spells

📅 Days to Maturity

85–110 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 8b

📆 Growing Season

256 days in Kendall County

Growing Tips for Butternut Squash in Kendall County

Direct sow Butternut Squash outdoors after March 09 in Kendall County when soil has warmed and frost danger has passed.

Common pests for Butternut Squash 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 weeks early or direct sow after frost. Allow 6-8 feet for sprawling vines. Harvest when the skin is hard and uniformly tan. Cure in the sun for 10 days.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Butternut Squash in Kendall County, TX?

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

What planting zone is Kendall County, TX?

Kendall County, Texas is in USDA Hardiness Zone 8b. The average last spring frost is March 9 and first fall frost is November 20.

🌱

Your Kendall County Garden Planner — Free

A 22-page printable planner built for Kendall 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 Kendall County, TX. Local conditions may vary. Last updated: June 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.