Fall planting windows are calculated backward from your average first frost date, not forward from today's date. Find your zone below, then count back from your local frost date using the days-to-maturity on your seed packet, plus a two-week buffer for shorter fall daylight.
Zones 3–4 (first frost: early–mid September)
Your fall window is short. Stick to fast-maturing greens — spinach, arugula, and baby lettuce — sown by late July. Anything with a maturity date over 45 days is a gamble.
Zones 5–6 (first frost: late September–early October)
Sow root vegetables like beets and carrots in early August, and quick greens through early September. Garlic goes in the ground in October for a following-summer harvest — this is the most commonly missed fall planting task in these zones.
Zones 7–8 (first frost: late October–November)
You have room for a genuine second vegetable season. Broccoli, cabbage, and kale transplants can go in through late August, and lettuce and spinach can be sown into October.
Zones 9–10 (first frost: rare or absent)
Fall is effectively your second spring. Cool-season crops that struggle in your summer heat — lettuce, peas, brassicas — do best planted from September through November for a winter and early-spring harvest.
