When to Plant Mizuna in Los Angeles, California (90021)

Location

Los Angeles, California

ZIP Code

90021

USDA Zone

10b

Last Frost

Thursday, January 15, 2026

📅 Planting Calendar

Direct Sow Outdoors Thursday, December 18, 2025

Pro Tip: Sow Mizuna directly outdoors 4 weeks before your last frost date.

🌿 Plant Details

Scientific Name Brassica rapa var. nipposinica

Days to Maturity 40 days

Mature Height 8-18"

Spread 8"

☀️ Growing Requirements

☀️

Sun

Partial to Full Sun (4-6 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

6" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 4-7 days

Ready to Plant Mizuna in Los Angeles?

Get your seeds now so they're ready by Thursday, December 18, 2025.

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🤝 Good Companions

CarrotOnionBeetSpinach

⚠️ Avoid Planting Near

StrawberryTomato

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Growing Mizuna in Zone 10b

Mizuna (Brassica rapa var. nipposinica) is a popular garden vegetable. In Los Angeles, California, which is in USDA Hardiness Zone 10b, you should direct sow seeds around Thursday, December 18, 2025.

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