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USDA hardiness zone by ZIP

USDA hardiness zone for ZIP 48226 (Detroit)

ZIP 48226 is USDA hardiness zone 6b; use the Detroit frost station's May 5 last frost and Oct 15 first frost to turn that zone into a planting calendar.

Source: detroit-metro frost station, USDA zone 6b, last updated 2026-06-28. Verify locally before planting high-value crops because microclimates, current weather, and yard exposure can move the safe date.

ZIP 48226 is in USDA hardiness zone 6b. For vegetables, the zone is useful context, but frost dates decide the actual planting window.

Use the ZIP calendar to turn the zone into crop-specific dates.

Planting calendars in zone 6b

Detroit, MI · Zone 6b Tomatoes May 12 Open answer · last frost May 5 Detroit, MI · Zone 6b Peppers May 19 Open answer · last frost May 5 Detroit, MI · Zone 6b Basil May 15 Open answer · last frost May 5 Detroit, MI · Zone 6b Carrots Apr 14 Open answer · last frost May 5 Detroit, MI · Zone 6b Lettuce Apr 21 Open answer · last frost May 5 Detroit, MI · Zone 6b Cucumbers May 15 Open answer · last frost May 5 Detroit, MI · Zone 6b Zucchini May 15 Open answer · last frost May 5 Detroit, MI · Zone 6b Cilantro Apr 21 Open answer · last frost May 5 Detroit, MI · Zone 6b Bush beans May 12 Open answer · last frost May 5 Detroit, MI · Zone 6b Spinach Apr 7 Open answer · last frost May 5 Detroit, MI · Zone 6b Radishes Apr 7 Open answer · last frost May 5 Detroit, MI · Zone 6b Kale Apr 21 Open answer · last frost May 5 Detroit, MI · Zone 6b Watermelon May 19 Open answer · last frost May 5