GrowZone

USDA hardiness zone by ZIP

USDA hardiness zone for ZIP 19103 (Philadelphia)

ZIP 19103 is USDA hardiness zone 7b; use the Philadelphia frost station's Apr 10 last frost and Nov 5 first frost to turn that zone into a planting calendar.

Source: philadelphia-intl frost station, USDA zone 7b, 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 19103 is in USDA hardiness zone 7b. 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 7b

Philadelphia, PA · Zone 7b Tomatoes Apr 17 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Peppers Apr 24 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Basil Apr 20 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Carrots Mar 20 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Lettuce Mar 27 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Cucumbers Apr 20 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Zucchini Apr 20 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Cilantro Mar 27 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Bush beans Apr 17 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Spinach Mar 13 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Radishes Mar 13 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Kale Mar 27 Open answer · last frost Apr 10 Philadelphia, PA · Zone 7b Watermelon Apr 24 Open answer · last frost Apr 10