When to Plant Swiss Chard in Pasadena, California (91105)

Location

Pasadena, California

ZIP Code

91105

USDA Zone

10a

Last Frost

Sunday, January 25, 2026

📅 Planting Calendar

Direct Sow Outdoors Sunday, December 28, 2025

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

🌿 Plant Details

Scientific Name Beta vulgaris subsp. vulgaris

Days to Maturity 55 days

Mature Height 18-24"

Spread 12"

Type Leaf

Fruit Size N/A

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (1-1.5 inches/week)

↔️

Spacing

8" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 5-10 days

Ready to Plant Swiss Chard in Pasadena?

Get your seeds now so they're ready by Sunday, December 28, 2025.

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🤝 Good Companions

BeetOnionBeanCabbage

⚠️ Avoid Planting Near

LeekCorn

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Growing Swiss Chard in Zone 10a

Swiss Chard (Beta vulgaris subsp. vulgaris) is a popular garden vegetable. In Pasadena, California, which is in USDA Hardiness Zone 10a, you should direct sow seeds around Sunday, December 28, 2025.

Your average last frost date is Sunday, January 25, 2026. Swiss Chard grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.