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Seasonal Planting Calendar

Updated May 2026 · 0 plants · 0 actions

Zone 2bNorthern TierZone 3bNorthern TierZone 4bMountain WestZone 5bMidwestZone 6aMidwestZone 7aMid-AtlanticZone 7bUpper SouthZone 8aSoutheastZone 8bPacific NorthwestZone 9aCalifornia MediterraneanZone 9bGulf Coast / SouthwestZone 10aSubtropical

Gulf Coast / Southwest stretches 294 frost-free days — long enough for succession plantings, overwintered brassicas, and a real summer heat window. September is the editorial lens for the workhorse month of september gardening. Pick a USDA zone above to compare calendars.

Zone 9b in September

☀️ In-season12 weeks to first frost
September is in-season for Gulf Coast / Southwest — your 294-day growing season is the long-form gardening calendar. Direct-seed succession crops, transplant the second wave of brassicas, and stay ahead of weeds and water before the first frost window 12 weeks out.

About Zone 9b

USDA Zone 9b (Gulf Coast / Southwest) has an average last frost of Feb 20 and first frost of Dec 10, giving roughly 294 frost-free days. Gulf Coast & low desert. Year-round growing possible with summer heat breaks. Sources: LSU AgCenter, UF IFAS Extension & Gulf Coast gardeners.

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