When to Plant Lemon Verbena in Simms, Montana (59477)

Location

Simms, Montana

ZIP Code

59477

USDA Zone

Last Frost

Tuesday, May 5, 2026

📅 Planting Calendar

Start Seeds Indoors Tuesday, March 24, 2026

Transplant Outdoors Tuesday, May 19, 2026

Pro Tip: Start Lemon Verbena seeds indoors 6 weeks before your last frost date, then transplant outdoors around Tuesday, May 19, 2026.

🌿 Plant Details

Scientific Name Aloysia citrodora

Days to Maturity 120 days

Mature Height 24-72"

Spread 36"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate (1 inch/week)

↔️

Spacing

24" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 14-30 days

Ready to Plant Lemon Verbena in Simms?

Get your seeds now so they're ready by Tuesday, March 24, 2026.

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Growing Lemon Verbena in Zone 4b

Lemon Verbena (Aloysia citrodora) is a popular garden vegetable. In Simms, Montana, which is in USDA Hardiness Zone 4b, you should start seeds indoors around Tuesday, March 24, 2026.

Your average last frost date is Tuesday, May 5, 2026. Plan to transplant your Lemon Verbena seedlings outdoors around Tuesday, May 19, 2026, about 2 weeks after your last frost date.