When to Plant Cosmos in Glendale, California (91204)

Location

Glendale, California

ZIP Code

91204

USDA Zone

10a

Last Frost

Sunday, January 25, 2026

📅 Planting Calendar

Direct Sow Outdoors Sunday, January 25, 2026

Pro Tip: Sow Cosmos directly outdoors around your last frost date when soil starts to warm.

🌿 Plant Details

Scientific Name Cosmos bipinnatus

Days to Maturity 60 days

Mature Height 24-60"

Spread 18"

Type Annual

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Low-Moderate

↔️

Spacing

18" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 7-14 days

Ready to Plant Cosmos in Glendale?

Get your seeds now so they're ready by Sunday, January 25, 2026.

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Other Plants for Glendale

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Growing Cosmos in Zone 10a

Cosmos (Cosmos bipinnatus) is a popular garden vegetable. In Glendale, California, which is in USDA Hardiness Zone 10a, you should direct sow seeds around Sunday, January 25, 2026.

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