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When to Plant Butternut Squash in Warren County, MS

Warren County, Mississippi Zone 8b May

Warren County, Mississippi gardeners: here's your May plan

May is a pivotal month for Warren County, Mississippi gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost March 10
Avg. first frost November 14
Soil temp (4") 71°F
Watering Low
Pest pressure High
Daylight 13.7 hrs
Looking ahead to June
  • First harvests: butternut squash

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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.

Warren County, Mississippi is in USDA Zone 8b. The average last spring frost is March 10 and the first fall frost is November 14, giving you a growing season of approximately 249 days.

At an elevation of 272 feet, Warren County receives approximately 61 inches of rainfall annually with predominantly clay loam soil. Summer highs average 93°F, providing good warmth for Butternut Squash during the growing season. Clay soil retains moisture well for Butternut Squash, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Butternut Squash root diseases.

Warren County, MS (Zone 8b) Long season
249 days
Last Spring Frost March 10
249 growing days
First Fall Frost November 14
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Warren County Soil Profile

Soil Type

Clay Loam

Soil pH

5.6-6.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (103 days to spare)
Start indoors: Feb 5 Transplant: Mar 19 🍅 Harvest: Jun 18 – Jul 23
Recommended (50%) ✓ Fits season (109 days to spare)
Start indoors: Feb 10 Transplant: Mar 24 🍅 Harvest: Jun 23 – Jul 28
Safe Start (90%) ✓ Fits season (101 days to spare)
Start indoors: Mar 6 Transplant: Apr 17 🍅 Harvest: Jul 17 – Aug 21

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 Warren County

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

Soil pH

Your soil pH (5.6–6.3) is more acidic than Butternut Squash prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

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

Organic Matter

Organic matter is moderate (2.8%). Annual compost additions will help Butternut Squash.

How to Plant Butternut Squash

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

Plant Water Budget

Plant needs
1.1″/week
Rainfall provides
1.0″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 158 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 5.2" 0" ❄️ Dormant
Feb 4.9" 0" ❄️ Dormant
Mar 4.8" 5.3" 0" ✅ Rainfall sufficient
Apr 4.8" 4.5" 0.3" 💧 Light watering
May 4.8" 4.1" 0.7" 💧 Light watering
Jun 4.8" 4.9" 0" ✅ Rainfall sufficient
Jul 4.8" 6.8" 0" ✅ Rainfall sufficient
Aug 4.8" 6.4" 0" ✅ Rainfall sufficient
Sep 4.8" 5.2" 0" ✅ Rainfall sufficient
Oct 4.8" 3.4" 1.4" 💧 Light watering
Nov 4.8" 5" 0" ✅ Rainfall sufficient
Dec 5.3" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Warren 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 ~1,926 GDD — county provides 4,917 GDD Excellent fit

Butternut Squash Planting Timeline — Warren County, MS

Butternut Squash Planting Calendar

Activity When Date Range
Start Indoors February 10 Feb 10 – Feb 24
Transplant Outdoors March 24 Mar 24 – Apr 7
Direct Sow March 17 Mar 17 – Apr 7
Harvest June 23 Jun 23 – Jul 28

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
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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: too_acidic

🗺️ USDA Zone

Zone 8b

📆 Growing Season

249 days in Warren County

Growing Tips for Butternut Squash in Warren County

Direct sow Butternut Squash outdoors after March 10 in Warren County when soil has warmed and frost danger has passed.

With Warren County's clay soil (31% clay), work in 3-4 inches of compost before planting Butternut Squash. Avoid tilling when soil is wet to prevent compaction.

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 Warren County, MS?

Warren County is in Zone 8b with an average last frost of March 10. Plan your Butternut Squash planting based on this frost date — see the calendar above for exact timing.

What planting zone is Warren County, MS?

Warren County, Mississippi is in USDA Hardiness Zone 8b. The average last spring frost is March 10 and first fall frost is November 14.

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Your Warren County Garden Planner — Free

A 24-page printable planner built for Warren 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 Warren County, MS. 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.