When to Plant Echinacea (Coneflower) in Wheeler Army Airfield, Hawaii (96854)

Location

Wheeler Army Airfield, Hawaii

ZIP Code

96854

USDA Zone

12a

Last Frost

Thursday, January 1, 2026

📅 Planting Calendar

Start Seeds Indoors Thursday, October 23, 2025

Transplant Outdoors Thursday, January 15, 2026

Pro Tip: Start Echinacea (Coneflower) seeds indoors 10 weeks before your last frost date, then transplant outdoors around Thursday, January 15, 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 Wheeler Army Airfield?

Get your seeds now so they're ready by Thursday, October 23, 2025.

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Growing Echinacea (Coneflower) in Zone 12a

Echinacea (Coneflower) (Echinacea purpurea) is a popular garden vegetable. In Wheeler Army Airfield, Hawaii, which is in USDA Hardiness Zone 12a, you should start seeds indoors around Thursday, October 23, 2025.

Your average last frost date is Thursday, January 1, 2026. Plan to transplant your Echinacea (Coneflower) seedlings outdoors around Thursday, January 15, 2026, about 2 weeks after your last frost date.