When to Plant Lupine in Phoenix, Arizona (85021)

Location

Phoenix, Arizona

ZIP Code

85021

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Planting Calendar

Direct Sow Outdoors Tuesday, January 13, 2026

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

🌿 Plant Details

Scientific Name Lupinus polyphyllus

Days to Maturity 365 days

Mature Height 24-48"

Spread 24"

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Moderate (1 inch/week)

↔️

Spacing

18" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 14-21 days

Ready to Plant Lupine in Phoenix?

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

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🤝 Good Companions

CarrotBrassicasCorn

⚠️ Avoid Planting Near

Fennel

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Growing Lupine in Zone 9b

Lupine (Lupinus polyphyllus) is a popular garden vegetable. In Phoenix, Arizona, 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. Lupine grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.