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When to Plant Zinnia in Dayton, Tennessee (37321)

Location

Dayton, Tennessee

ZIP Code

37321

USDA Zone

7b

Last Frost

Sunday, April 5, 2026

📅 Planting Calendar

Direct Sow Outdoors Sunday, April 12, 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 Dayton?

Get your seeds now so they're ready by Sunday, April 12, 2026.

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Growing Zinnia in Zone 7b

Zinnia (Zinnia elegans) is a popular garden vegetable. In Dayton, Tennessee, which is in USDA Hardiness Zone 7b, you should direct sow seeds around Sunday, April 12, 2026.

Your average last frost date is Sunday, April 5, 2026. Zinnia grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.