When to Plant Arugula in Whitewater, Montana (59544)

Location

Whitewater, Montana

ZIP Code

59544

USDA Zone

Last Frost

Wednesday, May 20, 2026

📅 Planting Calendar

Direct Sow Outdoors Wednesday, April 22, 2026

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

🌿 Plant Details

Scientific Name Eruca vesicaria subsp. sativa

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

0.25" deep

Seeds typically germinate in 3-7 days

Ready to Plant Arugula in Whitewater?

Get your seeds now so they're ready by Wednesday, April 22, 2026.

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🤝 Good Companions

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Growing Arugula in Zone 3b

Arugula (Eruca vesicaria subsp. sativa) is a popular garden vegetable. In Whitewater, Montana, which is in USDA Hardiness Zone 3b, you should direct sow seeds around Wednesday, April 22, 2026.

Your average last frost date is Wednesday, May 20, 2026. Arugula grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.