When to Plant Napa Cabbage in Whittier, California (90607)

Location

Whittier, California

ZIP Code

90607

USDA Zone

10b

Last Frost

Thursday, January 15, 2026

📅 Planting Calendar

Start Seeds Indoors Thursday, December 4, 2025

Transplant Outdoors Thursday, January 29, 2026

Pro Tip: Start Napa Cabbage seeds indoors 6 weeks before your last frost date, then transplant outdoors around Thursday, January 29, 2026.

🌿 Plant Details

Scientific Name Brassica rapa subsp. pekinensis

Days to Maturity 70 days

Mature Height 12-18"

Spread 12"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

18" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 4-7 days

Ready to Plant Napa Cabbage in Whittier?

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

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🤝 Good Companions

BeetOnionCeleryCucumber

⚠️ Avoid Planting Near

StrawberryTomatoPepper

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Growing Napa Cabbage in Zone 10b

Napa Cabbage (Brassica rapa subsp. pekinensis) is a popular garden vegetable. In Whittier, California, which is in USDA Hardiness Zone 10b, you should start seeds indoors around Thursday, December 4, 2025.

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