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When to Plant Nasturtium in Black Hawk, South Dakota (57718)

Location

Black Hawk, South Dakota

ZIP Code

57718

USDA Zone

5a

Last Frost

Sunday, May 10, 2026

📅 Planting Calendar

Direct Sow Outdoors Sunday, May 17, 2026

Pro Tip: Sow Nasturtium directly outdoors 1 week after your last frost date — it needs warm soil.

🌿 Plant Details

Scientific Name Tropaeolum majus
Days to Maturity 60 days
Mature Height 12-18"
Spread 18"
Type Annual

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Low (drought tolerant)

↔️

Spacing

12" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 7-14 days

Ready to Plant Nasturtium in Black Hawk?

Get your seeds now so they're ready by Sunday, May 17, 2026.

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🤝 Good Companions

TomatoCucumberSquashRadish

⚠️ Avoid Planting Near

Fennel

Other Plants for Black Hawk

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Growing Nasturtium in Zone 5a

Nasturtium (Tropaeolum majus) is a popular garden vegetable. In Black Hawk, South Dakota, which is in USDA Hardiness Zone 5a, you should direct sow seeds around Sunday, May 17, 2026.

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