Winter lawn care, month by month
| Month | Tasks |
|---|---|
| January | Dormant — keep leaves cleared, stay off frozen turf |
| February | Dormant — keep leaves cleared, stay off frozen turf |
| March | Dormant — keep leaves cleared, stay off frozen turf |
| April | Apply crabgrass pre-emergent |
| May | Apply crabgrass pre-emergent · Light feeding after green-up |
| June | Light feeding after green-up |
| July | Aerate + overseed |
| August | Aerate + overseed · Main fall feeding · Winterizer feeding |
| September | Winterizer feeding · Final mow of the year |
| October | Final mow of the year |
| November | Dormant — keep leaves cleared, stay off frozen turf |
| December | Dormant — keep leaves cleared, stay off frozen turf |
Reading the Winter lawn year
Winter runs on the classic northern rhythm: a short, important spring (pre-emergent before soil hits 55°F, one light feeding), a defensive summer (mow tall, water deep, feed nothing), and then the season that actually builds a lawn — early fall, when aeration, overseeding around Jul 29 – Aug 13, and the year's main feeding all land before the Sep 27 frost closes the year. With only ~131 frost-free days, the fall window is tight — miss it and the next real chance is spring.
Grasses that fit Winter
Frequently asked questions
When should I overseed my lawn in Winter?
For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Winter that means roughly Jul 29 – Aug 13, timed 45–60 days before the average first fall frost (Sep 27) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.
When do I put down crabgrass preventer in Winter?
Aim for Apr 28 – May 19 — the estimated stretch when Winter soil approaches the ~55°F germination threshold, anchored to the average last frost (May 19). It's an estimate: a soil thermometer reading 50–55°F at 2″ depth for several days is the precise trigger, and pre-emergent must go down before crabgrass sprouts, not after.
When should I stop mowing in Winter?
Keep mowing as long as the grass grows — in Winter that's typically until Sep 20 – Oct 11, around the average first fall frost (Sep 27). Take the final cut slightly shorter to discourage snow mold.
What grass grows best in Winter?
Wisconsin is cool-season country: Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue. See the grass guides linked below for identification and care.