When to Plant Bok Choy in Marine On Saint Croix, Minnesota (55047)
Location
Marine On Saint Croix, Minnesota
ZIP Code
55047
USDA Zone
4b
Last Frost
Tuesday, May 5, 2026
📅 Planting Calendar
Direct Sow Outdoors Tuesday, April 7, 2026
Pro Tip: Bok Choy can be directly sown outdoors. Plant 4 weeks before your last frost date.
🌿 Plant Details
Scientific Name Brassica rapa subsp. chinensis
Days to Maturity 45 days
☀️ Growing Requirements
☀️
Sun
Full Sun
💧
Water
Regular
Seeds typically germinate in 7-14 days
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Growing Bok Choy in Zone 4b
Bok Choy (Brassica rapa subsp. chinensis) is a popular garden vegetable. In Marine On Saint Croix, Minnesota, which is in USDA Hardiness Zone 4b, you should direct sow seeds around Tuesday, April 7, 2026.
Your average last frost date is Tuesday, May 5, 2026. Bok Choy grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.