LawnWeather

Milwaukee, WI Lawn Care Calendar

In a typical year, put down crabgrass preventer in Milwaukee between Apr 21 and May 22. The best time to overseed is between Aug 18 and Oct 7. The last spring frost usually comes around Apr 24. Most lawns here are cool-season grass (tall fescue, Kentucky bluegrass, ryegrass).

Typical lawn care dates in Milwaukee

Crabgrass preventer (pre-emergent)
Apr 21 – May 22
Spring fertilizer
May 15 – Jun 19
Overseeding & seeding
Aug 18 – Oct 7
Fall fertilizer
Aug 25 – Nov 2
Light band: typical frost-free season. Bars: typical windows.
TaskTypical window
Crabgrass preventer (pre-emergent)Crabgrass sprouts once soil stays above 55°F. Apply when soil reaches 50°F, before that happens.Apr 21 – May 22
Spring fertilizerA light feeding once soil warms past 55°F and the grass is actively growing.May 15 – Jun 19
Overseeding & seedingLate summer to early fall: seedlings need about 6–10 weeks of growth before the first frost.Aug 18 – Oct 7
Fall fertilizerThe most important feeding for cool-season grass, from early fall until soil cools to about 45°F.Aug 25 – Nov 2

Median dates, 2016–2025, from NOAA weather data for Milwaukee. This year's dates can differ by a few weeks.

Month-by-month lawn care in Milwaukee

  1. JanuaryNo treatments due; mow as needed.
  2. FebruaryNo treatments due; mow as needed.
  3. MarchNo treatments due; mow as needed.
  4. AprilCrabgrass preventer (pre-emergent)
  5. MayCrabgrass preventer (pre-emergent)Spring fertilizer
  6. JuneSpring fertilizer
  7. JulyNo treatments due; mow as needed.
  8. AugustOverseeding & seedingFall fertilizer
  9. SeptemberOverseeding & seedingFall fertilizer
  10. OctoberOverseeding & seedingFall fertilizer
  11. NovemberFall fertilizer
  12. DecemberNo treatments due; mow as needed.

Soil temperature in Milwaukee by month

Average soil temperature 4 inches down, estimated from 2016–2025 weather. It bottoms out in January at 25°F and peaks in July at 73°F. Crabgrass preventer goes down when it reaches 50°F, usually around Apr 21.

JanFebMarAprMayJunJulAugSepOctNovDec
25°F26°F36°F45°F55°F67°F73°F72°F66°F55°F41°F30°F

Milwaukee lawn timing, year by year

Over the last 10 years, soil in Milwaukee reached 50°F, the signal for crabgrass preventer, as early as Apr 6 (2021) and as late as May 15 (2020): 39 days apart. A fixed calendar date can't follow that, which is why the report above uses this year's soil temperature. Between the typical last spring frost (Apr 24) and first fall frost (Nov 1), the growing season lasts about 191 days.

YearCrabgrass window openedLast spring frostFirst fall frost
2025May 12Apr 11Nov 9
2024Apr 11Apr 25Nov 21
2023Apr 11Apr 18Oct 30
2022May 10Apr 28Oct 19
2021Apr 6Apr 22Nov 3
2020May 15May 9Oct 20
2019Apr 22Apr 28Oct 30
2018May 2Apr 29Oct 18
2017Apr 16Mar 29Nov 6
2016Apr 18Apr 12Nov 20

Estimated from daily temperatures for Milwaukee. A dash means it didn't happen that year.

Frequently asked questions

When should I apply pre-emergent in Milwaukee?

In a typical year, between Apr 21 and May 22. Put it down when soil reaches 50°F, before it stays above 55°F and crabgrass starts sprouting. Early springs move this up by a week or more, so check this year's soil temperature above.

When is the best time to plant grass seed in Milwaukee?

Early fall, typically Aug 18 – Oct 7, while soil cools from 65°F toward 50°F.

When is the last frost in Milwaukee?

The median last spring frost is Apr 24 and the median first fall frost is Nov 1 (2016–2025).

How long is the growing season in Milwaukee?

About 191 days, from the median last spring frost on Apr 24 to the median first fall frost on Nov 1 (2016–2025).

Lawn care guides

Growing vegetables too? See the Milwaukee planting calendarfor when to start seeds and plant outside.

More Wisconsin lawn calendars

Nearby cities in other states