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When to Plant Bachelor Button in Seattle, Washington (98109)

Location

Seattle, Washington

ZIP Code

98109

USDA Zone

9a

Last Frost

Friday, February 20, 2026

📅 Planting Calendar

Direct Sow Outdoors Friday, February 6, 2026

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 Seattle?

Get your seeds now so they're ready by Friday, February 6, 2026.

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Growing Bachelor Button in Zone 9a

Bachelor Button (Centaurea cyanus) is a popular garden vegetable. In Seattle, Washington, which is in USDA Hardiness Zone 9a, you should direct sow seeds around Friday, February 6, 2026.

Your average last frost date is Friday, February 20, 2026. Bachelor Button grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.