When to Plant Rosemary in Lathrop, California (95330)

Location

Lathrop, California

ZIP Code

95330

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Planting Calendar

Start Seeds Indoors Tuesday, December 2, 2025

Transplant Outdoors Tuesday, February 24, 2026

Pro Tip: Start Rosemary seeds indoors 10 weeks before your last frost date, then transplant outdoors around Tuesday, February 24, 2026.

🌿 Plant Details

Scientific Name Salvia rosmarinus

Days to Maturity 120 days

Mature Height 24-48"

Spread 24"

Type Shrub

Fruit Size N/A

☀️ Growing Requirements

☀️

Sun

Full Sun (6+ hours)

💧

Water

Low (drought tolerant)

↔️

Spacing

24" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 14-21 days

Ready to Plant Rosemary in Lathrop?

Get your seeds now so they're ready by Tuesday, December 2, 2025.

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Growing Rosemary in Zone 9b

Rosemary (Salvia rosmarinus) is a popular garden vegetable. In Lathrop, California, which is in USDA Hardiness Zone 9b, you should start seeds indoors around Tuesday, December 2, 2025.

Your average last frost date is Tuesday, February 10, 2026. Plan to transplant your Rosemary seedlings outdoors around Tuesday, February 24, 2026, about 2 weeks after your last frost date.