When to Plant Onion in Boone, North Carolina (28607)

Location

Boone, North Carolina

ZIP Code

28607

USDA Zone

Last Frost

Friday, April 10, 2026

📅 Planting Calendar

Start Seeds Indoors Friday, February 13, 2026

Transplant Outdoors Friday, April 24, 2026

Pro Tip: Start Onion seeds indoors 8 weeks before your last frost date, then transplant outdoors around Friday, April 24, 2026.

🌿 Plant Details

Scientific Name Allium cepa

Days to Maturity 100 days

Mature Height 12-18"

Spread 4"

Type Bulb

Fruit Size Medium (2-4 inch bulb)

☀️ Growing Requirements

☀️

Sun

Full Sun (6+ hours)

💧

Water

Moderate

↔️

Spacing

4" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 7-10 days

Ready to Plant Onion in Boone?

Get your seeds now so they're ready by Friday, February 13, 2026.

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🤝 Good Companions

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⚠️ Avoid Planting Near

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Growing Onion in Zone 7a

Onion (Allium cepa) is a popular garden vegetable. In Boone, North Carolina, which is in USDA Hardiness Zone 7a, you should start seeds indoors around Friday, February 13, 2026.

Your average last frost date is Friday, April 10, 2026. Plan to transplant your Onion seedlings outdoors around Friday, April 24, 2026, about 2 weeks after your last frost date.