When to Plant Bachelor Button in Kathryn, North Dakota (58049)

Location

Kathryn, North Dakota

ZIP Code

58049

USDA Zone

Last Frost

Friday, May 15, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Friday, May 1, 2026

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

Pro tip: Sow Bachelor Button directly outdoors 2 weeks before your last frost date.

🌿 Plant Details

Scientific Name Centaurea cyanus

Days to Maturity 60 days

Mature Height 12-30"

Spread 9"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Low to Moderate

↔️

Spacing

9" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 7-14 days

Ready to Plant Bachelor Button in Kathryn?

Get your seeds now so they're ready by Friday, May 1, 2026.

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🤝 Good Companions

TomatoBeanVegetable Garden

See the full companion planting guide for Bachelor Button →

🛠️ Supplies You'll Need

🌍 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 flower heads to dry completely on the plant. Harvest when fluffy seed heads are fully dry.

Processing

Pull seeds from dried flower heads — seeds have a small feathery tail. Dry 1 week in open envelope.

Seed Viability

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

Pro Tip

Bachelor buttons cross freely — expect some color variation when growing multiple colors and saving seed.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 56 plants of Bachelor Button. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Bachelor Button in Kathryn, North Dakota? +

In Kathryn (Zone 4a), direct sow Bachelor Button outdoors around Friday, May 1, 2026.

What is the last frost date for Kathryn, North Dakota? +

The average last spring frost date for Kathryn, North Dakota (ZIP 58049) is around Friday, May 15, 2026. This is based on NOAA climate normals for USDA Zone 4a.

How long does Bachelor Button take to grow? +

Bachelor Button typically matures in about 60 days from direct sowing. In Kathryn, that means you can expect harvest around Friday, May 1, 2026 plus 60 days.

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

Bachelor Button does best when direct sown outdoors. In Kathryn, sow directly around Friday, May 1, 2026.

📚 More Bachelor Button Planting Guides

🗺️

Bachelor Button in North Dakota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4a Bachelor Button Guide

All cities in your zone · Avg dates

→

Other Plants for Kathryn

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Growing Bachelor Button in Zone 4a

Bachelor Button (Centaurea cyanus) is a popular garden vegetable. In Kathryn, North Dakota, which is in USDA Hardiness Zone 4a, you should direct sow seeds around Friday, May 1, 2026.

Your average last frost date is Friday, May 15, 2026. Bachelor Button grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.