When to Plant Marigold in Houston, Texas (77046)

Location

Houston, Texas

ZIP Code

77046

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Planting Calendar

Start Seeds Indoors Tuesday, December 30, 2025

Transplant Outdoors Tuesday, February 24, 2026

Pro Tip: Start Marigold seeds indoors 6 weeks before your last frost date, then transplant outdoors around Tuesday, February 24, 2026.

🌿 Plant Details

Scientific Name Tagetes patula

Days to Maturity 50 days

Mature Height 6-24"

Spread 12"

Type Annual

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate (1 inch/week)

↔️

Spacing

12" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 5-10 days

Ready to Plant Marigold in Houston?

Get your seeds now so they're ready by Tuesday, December 30, 2025.

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Growing Marigold in Zone 9b

Marigold (Tagetes patula) is a popular garden vegetable. In Houston, Texas, which is in USDA Hardiness Zone 9b, you should start seeds indoors around Tuesday, December 30, 2025.

Your average last frost date is Tuesday, February 10, 2026. Plan to transplant your Marigold seedlings outdoors around Tuesday, February 24, 2026, about 2 weeks after your last frost date.