When to Plant Thyme in San Diego, California (92120)

Location

San Diego, California

ZIP Code

92120

USDA Zone

10b

Last Frost

Thursday, January 15, 2026

📅 Planting Calendar

Start Seeds Indoors Thursday, November 20, 2025

Transplant Outdoors Thursday, January 29, 2026

Pro Tip: Start Thyme seeds indoors 8 weeks before your last frost date, then transplant outdoors around Thursday, January 29, 2026.

🌿 Plant Details

Scientific Name Thymus vulgaris

Days to Maturity 90 days

Mature Height 6-12"

Spread 12"

Type Ground cover

Fruit Size N/A

☀️ Growing Requirements

☀️

Sun

Full Sun (6+ hours)

💧

Water

Low (drought tolerant)

↔️

Spacing

12" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 14-21 days

Ready to Plant Thyme in San Diego?

Get your seeds now so they're ready by Thursday, November 20, 2025.

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Growing Thyme in Zone 10b

Thyme (Thymus vulgaris) is a popular garden vegetable. In San Diego, California, which is in USDA Hardiness Zone 10b, you should start seeds indoors around Thursday, November 20, 2025.

Your average last frost date is Thursday, January 15, 2026. Plan to transplant your Thyme seedlings outdoors around Thursday, January 29, 2026, about 2 weeks after your last frost date.