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USDA hardiness zone by ZIP

USDA hardiness zone for ZIP 46204 (Indianapolis)

ZIP 46204 is USDA hardiness zone 6b; use the Indianapolis frost station's Apr 25 last frost and Oct 15 first frost to turn that zone into a planting calendar.

Source: indianapolis-intl 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 46204 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

Indianapolis, IN · Zone 6b Tomatoes May 2 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Peppers May 9 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Basil May 5 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Carrots Apr 4 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Lettuce Apr 11 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Cucumbers May 5 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Zucchini May 5 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Cilantro Apr 11 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Bush beans May 2 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Spinach Mar 28 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Radishes Mar 28 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Kale Apr 11 Open answer · last frost Apr 25 Indianapolis, IN · Zone 6b Watermelon May 9 Open answer · last frost Apr 25