When to Plant Oregano in Callaway, Minnesota (56521)

Location

Callaway, Minnesota

ZIP Code

56521

USDA Zone

Last Frost

Friday, May 15, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Friday, March 20, 2026

Transplant Outdoors

Friday, May 29, 2026

Based on last frost Friday, May 15, 2026 · Zone 4a

Pro tip: Start Oregano seeds indoors 8 weeks before your last frost date, then transplant outdoors around Friday, May 29, 2026.

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🌿 Plant Details

Scientific Name Origanum vulgare

Days to Maturity 80 days

Mature Height 12-24"

Spread 18"

Type Spreading

Fruit Size N/A

☀️ Growing Requirements

☀️

Sun

Full Sun (6+ hours)

💧

Water

Low to Moderate

↔️

Spacing

12" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 7-14 days

Ready to Plant Oregano in Callaway?

Get your seeds now so they're ready by Friday, March 20, 2026.

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🤝 Good Companions

PepperTomatoBasil

🤝

Full Companion Planting Guide for Oregano

See which plants help Oregano 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

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Let flower clusters dry fully on the plant — tiny seeds form in dried calyxes.

Processing

Strip dried clusters, rub between fingers over a bowl, winnow lightly to remove chaff.

Seed Viability

Up to 3 years when stored cool, dark, and dry.

Pro Tip

Greek oregano from seed may vary in flavor intensity. Propagate by cuttings for culinary consistency.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 32 plants of Oregano. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Oregano in Callaway, Minnesota? +

In Callaway (Zone 4a), start Oregano seeds indoors around Friday, March 20, 2026 and transplant outdoors around Friday, May 29, 2026.

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

The average last spring frost date for Callaway, Minnesota (ZIP 56521) is around Friday, May 15, 2026. This is based on NOAA climate normals for USDA Zone 4a.

How long does Oregano take to grow? +

Oregano typically matures in about 80 days from transplanting. In Callaway, that means you can expect harvest around Friday, May 29, 2026 plus 80 days.

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

Oregano should be started indoors 8 weeks before your last frost date. In Callaway, that means starting around Friday, March 20, 2026.

📚 More Oregano Planting Guides

🗺️

Oregano in Minnesota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4a Oregano Guide

All cities in your zone · Avg dates

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Growing Oregano in Zone 4a

Oregano (Origanum vulgare) is a popular garden vegetable. In Callaway, Minnesota, which is in USDA Hardiness Zone 4a, you should start seeds indoors around Friday, March 20, 2026.

Your average last frost date is Friday, May 15, 2026. Plan to transplant your Oregano seedlings outdoors around Friday, May 29, 2026, about 2 weeks after your last frost date.