Crops › Sow now
What to sow in September, in your zone
Sowing dates in the US swing weeks between zones. Give us your ZIP and the page you get is for yours: frost dates, what goes in this month, what's ready.
Every zone
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USDA zone 3
Last frost about 15 May, first about 15 September
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USDA zone 4
Last frost about 1 May, first about 1 October
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USDA zone 5
Last frost about 15 April, first about 15 October
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USDA zone 6
Last frost about 1 April, first about 30 October
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USDA zone 7
Last frost about 22 March, first about 15 November
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USDA zone 8
Last frost about 15 March, first about 30 November
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USDA zone 9
Last frost about 15 February, first about 15 December
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USDA zone 10
Last frost about 31 January, first about 31 December
Zones 1, 2 and 11 to 13: use the nearest of these. The sowing windows are worked out for zones 3 to 10.
Plan the plot, track every sowing, cook the harvest
Sowing reminders and harvest forecasts for your own frost dates, the Seed Tin, Scan Centre for any label or packet, and the Potty Mouth Garden Club. Free to start.
Tony C Smith
Allotment keeper in the North East of England, the voice behind the Tony C Smith YouTube channel, and the gardener who built GrowMore CookMore. Club numbers on this page update as members log their plots. Last updated 4 September 2026.