📍 National Mine, MI · Zone 4b · Last frost Tuesday, May 5, 2026
✏️ ChangeWhen to Plant Bachelor Button in National Mine, Michigan (49865)
Location
National Mine, Michigan
ZIP Code
49865
USDA Zone
4b
Last Frost
Tuesday, May 5, 2026
📅 Your 2026 Planting Dates
Direct Sow Outdoors
Tuesday, April 21, 2026
Based on last frost Tuesday, May 5, 2026 · Zone 4b
Pro tip: Sow Bachelor Button directly outdoors 2 weeks before your last frost date.
🌿 Plant Details
☀️ 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 National Mine?
Get your seeds now so they're ready by Tuesday, April 21, 2026.
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🤝 Good Companions
Full Companion Planting Guide for Bachelor Button
See which plants help Bachelor Button thrive, which to keep away, and raised bed layout tips →
🛠️ Supplies You'll Need
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🌾 Seed Saving Guide
🟢 EasyWhen 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 National Mine, Michigan? +
In National Mine (Zone 4b), direct sow Bachelor Button outdoors around Tuesday, April 21, 2026.
What is the last frost date for National Mine, Michigan? +
The average last spring frost date for National Mine, Michigan (ZIP 49865) is around Tuesday, May 5, 2026. This is based on NOAA climate normals for USDA Zone 4b.
How long does Bachelor Button take to grow? +
Bachelor Button typically matures in about 60 days from direct sowing. In National Mine, that means you can expect harvest around Tuesday, April 21, 2026 plus 60 days.
Should I start Bachelor Button indoors or direct sow in Michigan? +
Bachelor Button does best when direct sown outdoors. In National Mine, sow directly around Tuesday, April 21, 2026.
📚 More Bachelor Button Planting Guides
Other Plants for National Mine
Growing Bachelor Button in Zone 4b
Bachelor Button (Centaurea cyanus) is a popular garden vegetable. In National Mine, Michigan, which is in USDA Hardiness Zone 4b, you should direct sow seeds around Tuesday, April 21, 2026.
Your average last frost date is Tuesday, May 5, 2026. Bachelor Button grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.