When to Plant Bachelor Button in San Jose, California (95106)

Location

San Jose, California

ZIP Code

95106

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Planting Calendar

Direct Sow Outdoors Tuesday, January 27, 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 San Jose?

Get your seeds now so they're ready by Tuesday, January 27, 2026.

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Other Plants for San Jose

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Growing Bachelor Button in Zone 9b

Bachelor Button (Centaurea cyanus) is a popular garden vegetable. In San Jose, California, which is in USDA Hardiness Zone 9b, you should direct sow seeds around Tuesday, January 27, 2026.

Your average last frost date is Tuesday, February 10, 2026. Bachelor Button grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.