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When to Plant Napa Cabbage in Zone 3A

USDA Zone

3A

Cities Covered

25

Avg Last Frost

Monday, May 25, 2026

Plant Type

Indoor Start

📅 Planting Calendar for Zone 3A

Start Seeds Indoors Monday, April 13, 2026
Transplant Outdoors Monday, June 8, 2026

Pro Tip: Start Napa Cabbage seeds indoors 6 weeks before your last frost date for best results.

🌿 Plant Details

Scientific Name Brassica rapa subsp. pekinensis
Days to Maturity 70 days
Sun Requirements Full Sun (6-8 hours)
Plant Spacing 18" apart

Cities in Zone 3A

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Growing Napa Cabbage in USDA Zone 3A

Napa Cabbage (Brassica rapa subsp. pekinensis) grows well in USDA Hardiness Zone 3A. This zone includes cities like Embarrass, Soudan, Tower and 22 more.

The average last frost date for Zone 3A is around Monday, May 25, 2026. For best results, start your Napa Cabbage seeds indoors around Monday, April 13, 2026, then transplant outdoors around Monday, June 8, 2026.

Expect to harvest your Napa Cabbage approximately 70 days after planting.