When to Plant Sweet Pea in Houston, Texas (77021)

Location

Houston, Texas

ZIP Code

77021

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Planting Calendar

Direct Sow Outdoors Tuesday, January 13, 2026

Pro Tip: Sow Sweet Pea directly outdoors 4 weeks before your last frost date.

🌿 Plant Details

Scientific Name Lathyrus odoratus

Days to Maturity 65 days

Mature Height 48-72"

Spread 8"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

6" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 10-21 days

Ready to Plant Sweet Pea in Houston?

Get your seeds now so they're ready by Tuesday, January 13, 2026.

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🤝 Good Companions

CarrotRadishSpinach

⚠️ Avoid Planting Near

OnionGarlic

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Growing Sweet Pea in Zone 9b

Sweet Pea (Lathyrus odoratus) is a popular garden vegetable. In Houston, Texas, which is in USDA Hardiness Zone 9b, you should direct sow seeds around Tuesday, January 13, 2026.

Your average last frost date is Tuesday, February 10, 2026. Sweet Pea grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.