When to Plant Zinnia in Avoca, Iowa (51521)

Location

Avoca, Iowa

ZIP Code

51521

USDA Zone

Last Frost

Saturday, April 25, 2026

📅 Planting Calendar

Direct Sow Outdoors Saturday, May 2, 2026

Pro Tip: Sow Zinnia directly outdoors 1 week after your last frost date — it needs warm soil.

🌿 Plant Details

Scientific Name Zinnia elegans

Days to Maturity 60 days

Mature Height 12-36"

Spread 12"

Type Annual

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate (1 inch/week)

↔️

Spacing

12" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 5-10 days

Ready to Plant Zinnia in Avoca?

Get your seeds now so they're ready by Saturday, May 2, 2026.

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Other Plants for Avoca

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Growing Zinnia in Zone 5b

Zinnia (Zinnia elegans) is a popular garden vegetable. In Avoca, Iowa, which is in USDA Hardiness Zone 5b, you should direct sow seeds around Saturday, May 2, 2026.

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