When to Plant Cosmos in Miami, Florida (33178)

Location

Miami, Florida

ZIP Code

33178

USDA Zone

11a

Last Frost

Thursday, January 1, 2026

📅 Planting Calendar

Direct Sow Outdoors Thursday, January 1, 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 Miami?

Get your seeds now so they're ready by Thursday, January 1, 2026.

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Other Plants for Miami

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Growing Cosmos in Zone 11a

Cosmos (Cosmos bipinnatus) is a popular garden vegetable. In Miami, Florida, which is in USDA Hardiness Zone 11a, you should direct sow seeds around Thursday, January 1, 2026.

Your average last frost date is Thursday, January 1, 2026. Cosmos grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.