When to Plant Dahlia in Bird Island, Minnesota (55310)

Location

Bird Island, Minnesota

ZIP Code

55310

USDA Zone

Last Frost

Tuesday, May 5, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Tuesday, March 24, 2026

Transplant Outdoors

Tuesday, May 12, 2026

Based on last frost Tuesday, May 5, 2026 · Zone 4b

Pro tip: Start Dahlia seeds indoors 6 weeks before your last frost date, then transplant outdoors around Tuesday, May 12, 2026.

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🌿 Plant Details

Scientific Name Dahlia pinnata

Days to Maturity 90 days

Mature Height 18-60"

Spread 18"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

18" apart

🌱

Planting Depth

4" deep

Seeds typically germinate in 7-14 days

Ready to Plant Dahlia in Bird Island?

Get your seeds now so they're ready by Tuesday, March 24, 2026.

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🤝 Good Companions

MarigoldBasilCosmos

🤝

Full Companion Planting Guide for Dahlia

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

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🌍 Flower Garden Soil ✂️ Pruning Shears 🚿 Watering Can

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🌾 Seed Saving Guide

🟡 Moderate

⚠️ Many varieties are F1 hybrid — look for OP/heirloom types

When to Harvest Seed

Allow seed pods (behind the flower) to dry on the plant in fall.

Processing

Remove dried seed pods, extract flat seeds, dry 1 week in an open envelope.

Seed Viability

Up to 2 years when stored cool, dark, and dry.

Pro Tip

Dahlia seeds do not grow true to the parent — each seedling is a unique hybrid. Propagate named varieties by tuber division.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 14 plants of Dahlia. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Dahlia in Bird Island, Minnesota? +

In Bird Island (Zone 4b), start Dahlia seeds indoors around Tuesday, March 24, 2026 and transplant outdoors around Tuesday, May 12, 2026.

What is the last frost date for Bird Island, Minnesota? +

The average last spring frost date for Bird Island, Minnesota (ZIP 55310) is around Tuesday, May 5, 2026. This is based on NOAA climate normals for USDA Zone 4b.

How long does Dahlia take to grow? +

Dahlia typically matures in about 90 days from transplanting. In Bird Island, that means you can expect harvest around Tuesday, May 12, 2026 plus 90 days.

Should I start Dahlia indoors or direct sow in Minnesota? +

Dahlia should be started indoors 6 weeks before your last frost date. In Bird Island, that means starting around Tuesday, March 24, 2026.

📚 More Dahlia Planting Guides

🗺️

Dahlia in Minnesota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4b Dahlia Guide

All cities in your zone · Avg dates

→

Other Plants for Bird Island

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Growing Dahlia in Zone 4b

Dahlia (Dahlia pinnata) is a popular garden vegetable. In Bird Island, Minnesota, which is in USDA Hardiness Zone 4b, you should start seeds indoors around Tuesday, March 24, 2026.

Your average last frost date is Tuesday, May 5, 2026. Plan to transplant your Dahlia seedlings outdoors around Tuesday, May 12, 2026, about 1 weeks after your last frost date.