USDA Zone 9a — Garden & Frost Dates for Baton Rouge, LA (70801)
This is the local garden report for ZIP code 70801 (Baton Rouge, LA). It pairs the official USDA 2023 hardiness zone with NOAA-based frost dates so you can plan seeds, transplants, and fall crops with real numbers for your neighborhood.
What does zone 9a mean for Baton Rouge?
Zone 9a is the USDA Plant Hardiness Zone for ZIP 70801, based on the 30-year (1991-2020) average annual extreme minimum winter temperature. Perennial plants labeled for zone 9a or lower should survive a typical winter here. The last spring frost averages 03-05 and the first fall frost averages 11-18, giving roughly 258 frost-free growing days — the window that most vegetables need to go from seed to harvest.
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