When to Plant Bachelor Button in San Diego, California (92142)

Location

San Diego, California

ZIP Code

92142

USDA Zone

10b

Last Frost

Thursday, January 15, 2026

📅 Planting Calendar

Direct Sow Outdoors Thursday, January 1, 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 Diego?

Get your seeds now so they're ready by Thursday, January 1, 2026.

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Growing Bachelor Button in Zone 10b

Bachelor Button (Centaurea cyanus) is a popular garden vegetable. In San Diego, California, which is in USDA Hardiness Zone 10b, you should direct sow seeds around Thursday, January 1, 2026.

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