When to Plant Mustard in San Juan Capistrano, California (92693)

Location

San Juan Capistrano, California

ZIP Code

92693

USDA Zone

10b

Last Frost

Thursday, January 15, 2026

📅 Planting Calendar

Direct Sow Outdoors Thursday, December 4, 2025

Pro Tip: Sow Mustard directly outdoors 6 weeks before your last frost date.

🌿 Plant Details

Scientific Name Brassica juncea

Days to Maturity 56 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 1-7 days

Ready to Plant Mustard in San Juan Capistrano?

Get your seeds now so they're ready by Thursday, December 4, 2025.

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Growing Mustard in Zone 10b

Mustard (Brassica juncea) is a popular garden vegetable. In San Juan Capistrano, California, which is in USDA Hardiness Zone 10b, you should direct sow seeds around Thursday, December 4, 2025.

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