When to Plant Morning Glory in Bullhead, South Dakota (57621)

Location

Bullhead, South Dakota

ZIP Code

57621

USDA Zone

Last Frost

Tuesday, May 5, 2026

📅 Planting Calendar

Direct Sow Outdoors Tuesday, May 19, 2026

Pro Tip: Sow Morning Glory directly outdoors 2 weeks after your last frost date — it needs warm soil.

🌿 Plant Details

Scientific Name Ipomoea purpurea

Days to Maturity 65 days

Mature Height 72-120"

Spread 12"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Low to Moderate

↔️

Spacing

12" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 5-10 days

Ready to Plant Morning Glory in Bullhead?

Get your seeds now so they're ready by Tuesday, May 19, 2026.

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Other Plants for Bullhead

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Growing Morning Glory in Zone 4b

Morning Glory (Ipomoea purpurea) is a popular garden vegetable. In Bullhead, South Dakota, which is in USDA Hardiness Zone 4b, you should direct sow seeds around Tuesday, May 19, 2026.

Your average last frost date is Tuesday, May 5, 2026. Morning Glory grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.