When to Plant Celosia in San Jose, Illinois (62682)

Location

San Jose, Illinois

ZIP Code

62682

USDA Zone

Last Frost

Monday, April 20, 2026

📅 Planting Calendar

Start Seeds Indoors Monday, March 9, 2026

Transplant Outdoors Monday, April 27, 2026

Pro Tip: Start Celosia seeds indoors 6 weeks before your last frost date, then transplant outdoors around Monday, April 27, 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 San Jose?

Get your seeds now so they're ready by Monday, March 9, 2026.

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Growing Celosia in Zone 6a

Celosia (Celosia argentea) is a popular garden vegetable. In San Jose, Illinois, which is in USDA Hardiness Zone 6a, you should start seeds indoors around Monday, March 9, 2026.

Your average last frost date is Monday, April 20, 2026. Plan to transplant your Celosia seedlings outdoors around Monday, April 27, 2026, about 1 weeks after your last frost date.