When to Plant Echinacea (Coneflower) in Charter Oak, Iowa (51439)

Location

Charter Oak, Iowa

ZIP Code

51439

USDA Zone

Last Frost

Sunday, May 10, 2026

📅 Planting Calendar

Start Seeds Indoors Sunday, March 1, 2026

Transplant Outdoors Sunday, May 24, 2026

Pro Tip: Start Echinacea (Coneflower) seeds indoors 10 weeks before your last frost date, then transplant outdoors around Sunday, May 24, 2026.

🌿 Plant Details

Scientific Name Echinacea purpurea

Days to Maturity 365 days

Mature Height 24-48"

Spread 24"

Type Perennial

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Low (drought tolerant once established)

↔️

Spacing

18" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 14-21 days

Ready to Plant Echinacea (Coneflower) in Charter Oak?

Get your seeds now so they're ready by Sunday, March 1, 2026.

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Growing Echinacea (Coneflower) in Zone 5a

Echinacea (Coneflower) (Echinacea purpurea) is a popular garden vegetable. In Charter Oak, Iowa, which is in USDA Hardiness Zone 5a, you should start seeds indoors around Sunday, March 1, 2026.

Your average last frost date is Sunday, May 10, 2026. Plan to transplant your Echinacea (Coneflower) seedlings outdoors around Sunday, May 24, 2026, about 2 weeks after your last frost date.