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When to Plant Lupine in Walla Walla, Washington (99362)

Location

Walla Walla, Washington

ZIP Code

99362

USDA Zone

7a

Last Frost

Friday, April 10, 2026

📅 Planting Calendar

Direct Sow Outdoors Friday, March 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 Walla Walla?

Get your seeds now so they're ready by Friday, March 13, 2026.

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🤝 Good Companions

CarrotBrassicasCorn

⚠️ Avoid Planting Near

Fennel

Other Plants for Walla Walla

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Growing Lupine in Zone 7a

Lupine (Lupinus polyphyllus) is a popular garden vegetable. In Walla Walla, Washington, which is in USDA Hardiness Zone 7a, you should direct sow seeds around Friday, March 13, 2026.

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