When to Plant Celosia in Penryn, Pennsylvania (17564)

Location

Penryn, Pennsylvania

ZIP Code

17564

USDA Zone

Last Frost

Friday, April 10, 2026

📅 Planting Calendar

Start Seeds Indoors Friday, February 27, 2026

Transplant Outdoors Friday, April 17, 2026

Pro Tip: Start Celosia seeds indoors 6 weeks before your last frost date, then transplant outdoors around Friday, April 17, 2026.

🌿 Plant Details

Scientific Name Celosia argentea

Days to Maturity 75 days

Mature Height 12-36"

Spread 9"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate (1 inch/week)

↔️

Spacing

9" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 10-14 days

Ready to Plant Celosia in Penryn?

Get your seeds now so they're ready by Friday, February 27, 2026.

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🤝 Good Companions

MarigoldZinniaBasil

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Growing Celosia in Zone 7a

Celosia (Celosia argentea) is a popular garden vegetable. In Penryn, Pennsylvania, which is in USDA Hardiness Zone 7a, you should start seeds indoors around Friday, February 27, 2026.

Your average last frost date is Friday, April 10, 2026. Plan to transplant your Celosia seedlings outdoors around Friday, April 17, 2026, about 1 weeks after your last frost date.