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When to Plant Rutabaga in Biwabik, Minnesota (55708)

Location

Biwabik, Minnesota

ZIP Code

55708

USDA Zone

3b

Last Frost

Wednesday, May 20, 2026

📅 Planting Calendar

Direct Sow Outdoors Wednesday, February 11, 2026

Pro Tip: Sow Rutabaga directly outdoors 14 weeks before your last frost date.

🌿 Plant Details

Scientific Name Brassica napus var. napobrassica
Days to Maturity 90 days
Mature Height 18-24"
Spread 8"
Type Root
Fruit Size Medium-Large (3-5 inches)

☀️ Growing Requirements

☀️

Sun

Full Sun (6+ hours)

💧

Water

Regular (1 inch/week)

↔️

Spacing

8" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 4-7 days

Ready to Plant Rutabaga in Biwabik?

Get your seeds now so they're ready by Wednesday, February 11, 2026.

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🤝 Good Companions

OnionGarlicPeaBean

⚠️ Avoid Planting Near

TomatoPepper

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Growing Rutabaga in Zone 3b

Rutabaga (Brassica napus var. napobrassica) is a popular garden vegetable. In Biwabik, Minnesota, which is in USDA Hardiness Zone 3b, you should direct sow seeds around Wednesday, February 11, 2026.

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