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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

Midwest gets 162 frost-free days — enough room for one full warm-season crop and a quick cool-season second act. September is the editorial lens for what to start, transplant, and direct-seed now. Pick a USDA zone above to compare.

Zone 6a in September

☀️ In-season4 weeks to first frost
September is in-season for Midwest — your 162-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 4 weeks out.

About Zone 6a

USDA Zone 6a (Midwest) has an average last frost of May 1 and first frost of Oct 10, giving roughly 162 frost-free days. Mid-May frost-free start. Hot July/august — mulch heavily. Sources: Ohio State Extension, MSU Extension & Great Lakes gardeners.

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