When to Plant Bachelor Button in Fort Lupton, Colorado (80621)

Location

Fort Lupton, Colorado

ZIP Code

80621

USDA Zone

Last Frost

Saturday, April 25, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Saturday, April 11, 2026

Based on last frost Saturday, April 25, 2026 · Zone 5b

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

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🌿 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 Fort Lupton?

Get your seeds now so they're ready by Saturday, April 11, 2026.

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🤝 Good Companions

TomatoBeanVegetable Garden

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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

🌍 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 Fort Lupton, Colorado? +

In Fort Lupton (Zone 5b), direct sow Bachelor Button outdoors around Saturday, April 11, 2026.

What is the last frost date for Fort Lupton, Colorado? +

The average last spring frost date for Fort Lupton, Colorado (ZIP 80621) is around Saturday, April 25, 2026. This is based on NOAA climate normals for USDA Zone 5b.

How long does Bachelor Button take to grow? +

Bachelor Button typically matures in about 60 days from direct sowing. In Fort Lupton, that means you can expect harvest around Saturday, April 11, 2026 plus 60 days.

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

Bachelor Button does best when direct sown outdoors. In Fort Lupton, sow directly around Saturday, April 11, 2026.

📚 More Bachelor Button Planting Guides

🗺️

Bachelor Button in Colorado

Zone-by-zone breakdown · Full state guide

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Zone 5b Bachelor Button Guide

All cities in your zone · Avg dates

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Growing Bachelor Button in Zone 5b

Bachelor Button (Centaurea cyanus) is a popular garden vegetable. In Fort Lupton, Colorado, which is in USDA Hardiness Zone 5b, you should direct sow seeds around Saturday, April 11, 2026.

Your average last frost date is Saturday, April 25, 2026. Bachelor Button grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.