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When to Plant Spinach in Collinsville, Oklahoma (74021)

Location

Collinsville, Oklahoma

ZIP Code

74021

USDA Zone

7a

Last Frost

Friday, April 10, 2026

📅 Planting Calendar

Direct Sow Outdoors Friday, February 27, 2026

Pro Tip: Sow Spinach directly outdoors 6 weeks before your last frost date.

🌿 Plant Details

Scientific Name Spinacia oleracea
Days to Maturity 40 days
Mature Height 6-12"
Spread 6"
Type Leaf
Fruit Size N/A

☀️ Growing Requirements

☀️

Sun

Partial Shade to Full Sun

💧

Water

Regular (keep moist)

↔️

Spacing

6" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 7-14 days

Ready to Plant Spinach in Collinsville?

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

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🤝 Good Companions

StrawberryPeaBeanBrassicas

Other Plants for Collinsville

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Growing Spinach in Zone 7a

Spinach (Spinacia oleracea) is a popular garden vegetable. In Collinsville, Oklahoma, which is in USDA Hardiness Zone 7a, you should direct sow seeds around Friday, February 27, 2026.

Your average last frost date is Friday, April 10, 2026. Spinach grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.