When to Plant Snapdragon in Harlingen, Texas (78552)

Location

Harlingen, Texas

ZIP Code

78552

USDA Zone

10a

Last Frost

Sunday, January 25, 2026

📅 Planting Calendar

Start Seeds Indoors Sunday, November 30, 2025

Transplant Outdoors Sunday, February 8, 2026

Pro Tip: Start Snapdragon seeds indoors 8 weeks before your last frost date, then transplant outdoors around Sunday, February 8, 2026.

🌿 Plant Details

Scientific Name Antirrhinum majus

Days to Maturity 60 days

Mature Height 12-36"

Spread 12"

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

12" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 10-21 days

Ready to Plant Snapdragon in Harlingen?

Get your seeds now so they're ready by Sunday, November 30, 2025.

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Growing Snapdragon in Zone 10a

Snapdragon (Antirrhinum majus) is a popular garden vegetable. In Harlingen, Texas, which is in USDA Hardiness Zone 10a, you should start seeds indoors around Sunday, November 30, 2025.

Your average last frost date is Sunday, January 25, 2026. Plan to transplant your Snapdragon seedlings outdoors around Sunday, February 8, 2026, about 2 weeks after your last frost date.