When to Plant Hollyhock 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 19, 2026

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

Pro tip: Start Hollyhock seeds indoors 6 weeks before your last frost date, then transplant outdoors around Tuesday, May 19, 2026.

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🌿 Plant Details

Scientific Name Alcea rosea

Days to Maturity 365 days

Mature Height 48-96"

Spread 24"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate (1 inch/week)

↔️

Spacing

18" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 10-14 days

Ready to Plant Hollyhock in Bird Island?

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

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🤝 Good Companions

RoseVegetable Garden

🤝

Full Companion Planting Guide for Hollyhock

See which plants help Hollyhock 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

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow seed pods (disc-shaped) to dry on the stalk after petals drop. Harvest when brown and papery.

Processing

Remove seeds from papery rings, spread to dry 1 week before storing.

Seed Viability

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

Pro Tip

Hollyhocks cross freely with other hollyhock varieties. Expect some color variation in seed-grown plants.

🪴

Raised Bed Planting Guides

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

Frequently Asked Questions

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

In Bird Island (Zone 4b), start Hollyhock seeds indoors around Tuesday, March 24, 2026 and transplant outdoors around Tuesday, May 19, 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 Hollyhock take to grow? +

Hollyhock typically matures in about 365 days from transplanting. In Bird Island, that means you can expect harvest around Tuesday, May 19, 2026 plus 365 days.

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

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

📚 More Hollyhock Planting Guides

🗺️

Hollyhock in Minnesota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4b Hollyhock Guide

All cities in your zone · Avg dates

→

Other Plants for Bird Island

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Growing Hollyhock in Zone 4b

Hollyhock (Alcea rosea) 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 Hollyhock seedlings outdoors around Tuesday, May 19, 2026, about 2 weeks after your last frost date.