Fall Planting Calendar 2026: What to Do in Your Lawn & Garden, by Date

Count back from your first frost date. Cool-season lawns (North, Midwest, Pacific Northwest, mountains) overseed 7–4 weeks and core-aerate 7–3 weeks before first frost — late August in Minnesota, mid-September in Ohio, early October in Virginia — and take the big fertilizer feed 4–1 weeks before. Warm-season lawns (South) are not seeded in fall at all, and their LAST nitrogen is set by a calendar cutoff — mid-August to early September in most of the South, September in Florida and Texas — not by a countdown from a frost date that arrives in late November. Enter your ZIP above for dated windows and a live soil reading.

Every window is computed from NOAA 1991–2020 median first- and last-frost dates for your state, shifted by grass-zone rules that follow land-grant extension guidance (overseed 7–4 weeks and core-aerate 7–3 weeks before frost, garlic around first frost, bulbs when soil drops under 55°F, sprinklers before the first hard freeze). Warm-season fall nitrogen is the exception: it comes from each Southern extension program’s calendar cutoff, not from the frost date. Live soil temperature from Open-Meteo then overrides the calendar for the soil-gated tasks.

Around your first frost date — two weeks before to three weeks after — so cloves root for 4–6 weeks before the ground freezes without much top growth. That is late September in the Upper Midwest, mid-October across the Midwest and Northeast, and November in the South, where softneck varieties need little chilling.

When soil at 6 inches falls below about 55°F — usually a week or two after first frost in the North and Midwest (October), late November into December in the South with pre-chilled bulbs. Planting into warm soil rots bulbs or pushes premature sprouting.

Before the first hard freeze (28°F), which typically arrives one to three weeks after the first light frost. Shut the supply, blow out each zone with compressed air at 50–80 psi, open the backflow preventer test cocks, and turn the controller off. In the Rockies and northern Plains that is late September; in the mid-Atlantic, early November.

Fall, decisively, for cool-season grass: soil is warm for germination, air is cool, weeds are winding down, and seedlings get two growing seasons (fall and spring) before summer heat. Spring seeding competes with crabgrass and must survive July. Warm-season grasses are the exception — they are seeded, plugged, or sprigged in late spring when soil tops 65°F.

As soil at 2–4 inches cools toward 70°F — late August in the North, mid-September in the transition zone and South. That stops annual bluegrass (Poa annua), henbit, and chickweed. Skip fall pre-emergent on any lawn you are overseeding; it blocks grass seed too.

Cool-season lawns: the final "winterizer" feed goes down around the last mow, 1–4 weeks before first frost, and must land before the ground freezes — many states (NY, NJ, MD, MA) also set legal cutoff dates between November 15 and December 1. Warm-season lawns: the last nitrogen goes down by mid-August to early September across most of the South (Clemson says none after August 15, the LSU AgCenter none after August), and by the end of September in Florida and Texas; a later feed invites winterkill and large patch disease.