When to Plant Butternut Squash in Agate, North Dakota (58310)

Location

Agate, North Dakota

ZIP Code

58310

USDA Zone

Last Frost

Wednesday, May 20, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Wednesday, April 22, 2026

Transplant Outdoors

Wednesday, June 3, 2026

Based on last frost Wednesday, May 20, 2026 · Zone 3b

Pro tip: Start Butternut Squash seeds indoors 4 weeks before your last frost date, then transplant outdoors around Wednesday, June 3, 2026.

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🌿 Plant Details

Scientific Name Cucurbita moschata

Days to Maturity 100 days

Mature Height 12-18"

Spread 72"

Type Vine

Fruit Size Large (2-5 lbs)

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1 inch/week)

↔️

Spacing

60" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 5-10 days

Ready to Plant Butternut Squash in Agate?

Get your seeds now so they're ready by Wednesday, April 22, 2026.

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🤝 Good Companions

CornBeanMarigoldNasturtium

⚠️ Avoid Planting Near

Potato

🤝

Full Companion Planting Guide for Butternut Squash

See which plants help Butternut Squash thrive, which to keep away, and raised bed layout tips →

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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🌾 Seed Saving Guide

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Cure squash for 4–6 weeks after harvest before extracting seeds — curing improves seed viability.

Processing

Scoop seeds from cured squash, rinse off stringy flesh, spread to dry for 2 weeks.

Seed Viability

Up to 4 years when stored cool, dark, and dry.

Pro Tip

Butternut is C. moschata — crosses with other moschata varieties but generally not with C. pepo squashes.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 1 plant of Butternut Squash. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Butternut Squash in Agate, North Dakota? +

In Agate (Zone 3b), start Butternut Squash seeds indoors around Wednesday, April 22, 2026 and transplant outdoors around Wednesday, June 3, 2026.

What is the last frost date for Agate, North Dakota? +

The average last spring frost date for Agate, North Dakota (ZIP 58310) is around Wednesday, May 20, 2026. This is based on NOAA climate normals for USDA Zone 3b.

How long does Butternut Squash take to grow? +

Butternut Squash typically matures in about 100 days from transplanting. In Agate, that means you can expect harvest around Wednesday, June 3, 2026 plus 100 days.

Should I start Butternut Squash indoors or direct sow in North Dakota? +

Butternut Squash should be started indoors 4 weeks before your last frost date. In Agate, that means starting around Wednesday, April 22, 2026.

📚 More Butternut Squash Planting Guides

🗺️

Butternut Squash in North Dakota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 3b Butternut Squash Guide

All cities in your zone · Avg dates

→

Other Plants for Agate

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Growing Butternut Squash in Zone 3b

Butternut Squash (Cucurbita moschata) is a popular garden vegetable. In Agate, North Dakota, which is in USDA Hardiness Zone 3b, you should start seeds indoors around Wednesday, April 22, 2026.

Your average last frost date is Wednesday, May 20, 2026. Plan to transplant your Butternut Squash seedlings outdoors around Wednesday, June 3, 2026, about 2 weeks after your last frost date.