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When to Plant Nasturtium in Kalskag, Alaska (99607)

Location

Kalskag, Alaska

ZIP Code

99607

USDA Zone

3b

Last Frost

Wednesday, May 20, 2026

๐Ÿ“… Planting Calendar

Direct Sow Outdoors Wednesday, May 27, 2026

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

๐ŸŒฟ Plant Details

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

โ˜€๏ธ Growing Requirements

โ˜€๏ธ

Sun

Full Sun to Partial Shade

๐Ÿ’ง

Water

Low (drought tolerant)

โ†”๏ธ

Spacing

12" apart

๐ŸŒฑ

Planting Depth

0.5" deep

Seeds typically germinate in 7-14 days

Ready to Plant Nasturtium in Kalskag?

Get your seeds now so they're ready by Wednesday, May 27, 2026.

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๐Ÿค Good Companions

TomatoCucumberSquashRadish

โš ๏ธ Avoid Planting Near

Fennel

Other Plants for Kalskag

Growing Nasturtium in Zone 3b

Nasturtium (Tropaeolum majus) is a popular garden vegetable. In Kalskag, Alaska, which is in USDA Hardiness Zone 3b, you should direct sow seeds around Wednesday, May 27, 2026.

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