When to Plant Pumpkin in Phoenix, Arizona (85021)

Location

Phoenix, Arizona

ZIP Code

85021

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Planting Calendar

Direct Sow Outdoors Tuesday, December 30, 2025

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

🌿 Plant Details

Scientific Name Cucurbita maxima

Days to Maturity 100 days

Mature Height 12-24"

Spread 120"

Type Vine

Fruit Size Large (8-20 lbs)

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1 inch/week)

↔️

Spacing

60" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 5-10 days

Ready to Plant Pumpkin in Phoenix?

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

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🤝 Good Companions

CornBeanMarigoldNasturtium

⚠️ Avoid Planting Near

Potato

Other Plants for Phoenix

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Growing Pumpkin in Zone 9b

Pumpkin (Cucurbita maxima) is a popular garden vegetable. In Phoenix, Arizona, which is in USDA Hardiness Zone 9b, you should direct sow seeds around Tuesday, December 30, 2025.

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