When to Plant Hollyhock 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 8, 2026

Transplant Outdoors

Wednesday, June 3, 2026

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

Pro tip: Start Hollyhock seeds indoors 6 weeks before your last frost date, then transplant outdoors around Wednesday, June 3, 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 Agate?

Get your seeds now so they're ready by Wednesday, April 8, 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 Agate, North Dakota? +

In Agate (Zone 3b), start Hollyhock seeds indoors around Wednesday, April 8, 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 Hollyhock take to grow? +

Hollyhock typically matures in about 365 days from transplanting. In Agate, that means you can expect harvest around Wednesday, June 3, 2026 plus 365 days.

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

Hollyhock should be started indoors 6 weeks before your last frost date. In Agate, that means starting around Wednesday, April 8, 2026.

📚 More Hollyhock Planting Guides

🗺️

Hollyhock in North Dakota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 3b Hollyhock Guide

All cities in your zone · Avg dates

→

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Growing Hollyhock in Zone 3b

Hollyhock (Alcea rosea) is a popular garden vegetable. In Agate, North Dakota, which is in USDA Hardiness Zone 3b, you should start seeds indoors around Wednesday, April 8, 2026.

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