When to Plant Spaghetti Squash in Biwabik, Minnesota (55708)

Location

Biwabik, Minnesota

ZIP Code

55708

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 Spaghetti 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 pepo

Days to Maturity 90 days

Mature Height 12-18"

Spread 60"

Type Vine

Fruit Size Large (4-8 lbs)

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1 inch/week)

↔️

Spacing

48" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 5-10 days

Ready to Plant Spaghetti Squash in Biwabik?

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 Spaghetti Squash

See which plants help Spaghetti 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 1 month after harvest before extracting seeds.

Processing

Scoop seeds, rinse thoroughly, dry flat on screen for 2 weeks.

Seed Viability

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

Pro Tip

Spaghetti squash is C. pepo — crosses with zucchini, acorn, and pumpkin. Isolate by 500 feet.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 2 plants of Spaghetti Squash. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Spaghetti Squash in Biwabik, Minnesota? +

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

What is the last frost date for Biwabik, Minnesota? +

The average last spring frost date for Biwabik, Minnesota (ZIP 55708) is around Wednesday, May 20, 2026. This is based on NOAA climate normals for USDA Zone 3b.

How long does Spaghetti Squash take to grow? +

Spaghetti Squash typically matures in about 90 days from transplanting. In Biwabik, that means you can expect harvest around Wednesday, June 3, 2026 plus 90 days.

Should I start Spaghetti Squash indoors or direct sow in Minnesota? +

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

📚 More Spaghetti Squash Planting Guides

🗺️

Spaghetti Squash in Minnesota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 3b Spaghetti Squash Guide

All cities in your zone · Avg dates

→

Other Plants for Biwabik

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Growing Spaghetti Squash in Zone 3b

Spaghetti Squash (Cucurbita pepo) is a popular garden vegetable. In Biwabik, Minnesota, 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 Spaghetti Squash seedlings outdoors around Wednesday, June 3, 2026, about 2 weeks after your last frost date.