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When to Plant Butternut Squash in Dunklin County, MO

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.

Dunklin County, Missouri is in USDA Zone 7a. The average last spring frost is March 27 and the first fall frost is November 2, giving you a growing season of approximately 220 days.

At an elevation of 1,344 feet, Dunklin County receives approximately 33.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 94ยฐF, providing good warmth for Butternut Squash during the growing season.

Dunklin County, MO (Zone 7a) Long season
220 days
Last Spring Frost March 27
220 growing days
First Fall Frost November 2

Dunklin County Soil Profile

Soil Type

Silt Loam

Soil pH

5.6-7.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (83 days to spare)
Start indoors: Feb 19 Transplant: Apr 2 🍅 Harvest: Jul 2 – Aug 6
Recommended (50%) ✓ Fits season (80 days to spare)
Start indoors: Feb 27 Transplant: Apr 10 🍅 Harvest: Jul 10 – Aug 14
Safe Start (90%) ✓ Fits season (80 days to spare)
Start indoors: Mar 19 Transplant: Apr 30 🍅 Harvest: Jul 30 – Sep 3

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.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.6″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 706 gal / 100 sq ft
Butternut Squash needs ~1,999 GDD — county provides 4,510 GDD Excellent fit

Butternut Squash Planting Timeline โ€” Dunklin County, MO

Butternut Squash Planting Calendar

Activity When Date Range
Start Indoors February 27 Feb 27 โ€“ Mar 13
Transplant Outdoors April 10 Apr 10 โ€“ Apr 24
Direct Sow April 3 Apr 3 โ€“ Apr 24
Harvest July 10 Jul 10 โ€“ Aug 14

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

85โ€“110 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 7a

Growing Season

220 days

Growing Tips for Dunklin County

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

Level Up Your Garden

Frequently Asked Questions

When should I plant Butternut Squash in Dunklin County, MO?

Dunklin County is in Zone 7a with an average last frost of March 27. Plan your Butternut Squash planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Dunklin County, MO?

Dunklin County, Missouri is in USDA Hardiness Zone 7a. The average last spring frost is March 27 and first fall frost is November 2.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Dunklin County gardeners in Zone 7a organize planting dates, track what's growing, and never miss a planting window.

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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 Dunklin County, MO. Local conditions may vary. Last updated: April 2026.