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USDA hardiness zone by ZIP

USDA hardiness zone for ZIP 78205 (San Antonio)

ZIP 78205 is USDA hardiness zone 9a; use the San Antonio frost station's Mar 1 last frost and Nov 20 first frost to turn that zone into a planting calendar.

Source: san-antonio-intl frost station, USDA zone 9a, 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 78205 is in USDA hardiness zone 9a. 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 9a

San Antonio, TX · Zone 9a Tomatoes Mar 8 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Peppers Mar 15 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Basil Mar 11 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Carrots Feb 8 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Lettuce Feb 15 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Cucumbers Mar 11 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Zucchini Mar 11 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Cilantro Feb 15 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Bush beans Mar 8 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Spinach Feb 1 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Radishes Feb 1 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Kale Feb 15 Open answer · last frost Mar 1 San Antonio, TX · Zone 9a Watermelon Mar 15 Open answer · last frost Mar 1