Detroit, MI Lawn Care Calendar
In a typical year, put down crabgrass preventer in Detroit between Apr 19 and May 4. The best time to overseed is between Aug 24 and Oct 13. The last spring frost usually comes around Apr 22. Most lawns here are cool-season grass (tall fescue, Kentucky bluegrass, ryegrass).
Typical lawn care dates in Detroit
| Task | Typical window |
|---|---|
| Crabgrass preventer (pre-emergent)Crabgrass sprouts once soil stays above 55°F. Apply when soil reaches 50°F, before that happens. | Apr 19 – May 4 |
| Spring fertilizerA light feeding once soil warms past 55°F and the grass is actively growing. | Apr 27 – Jun 1 |
| Overseeding & seedingLate summer to early fall: seedlings need about 6–10 weeks of growth before the first frost. | Aug 24 – Oct 13 |
| Fall fertilizerThe most important feeding for cool-season grass, from early fall until soil cools to about 45°F. | Sep 3 – Nov 12 |
Median dates, 2016–2025, from NOAA weather data for Detroit. This year's dates can differ by a few weeks.
Month-by-month lawn care in Detroit
- JanuaryNo treatments due; mow as needed.
- FebruaryNo treatments due; mow as needed.
- MarchNo treatments due; mow as needed.
- AprilCrabgrass preventer (pre-emergent)Spring fertilizer
- MayCrabgrass preventer (pre-emergent)Spring fertilizer
- JuneSpring fertilizer
- JulyNo treatments due; mow as needed.
- AugustOverseeding & seeding
- SeptemberOverseeding & seedingFall fertilizer
- OctoberOverseeding & seedingFall fertilizer
- NovemberFall fertilizer
- DecemberNo treatments due; mow as needed.
Soil temperature in Detroit by month
Average soil temperature 4 inches down, estimated from 2016–2025 weather. It bottoms out in January at 28°F and peaks in July at 76°F. Crabgrass preventer goes down when it reaches 50°F, usually around Apr 19.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 28°F | 30°F | 38°F | 48°F | 59°F | 70°F | 76°F | 74°F | 68°F | 56°F | 43°F | 33°F |
Detroit lawn timing, year by year
Over the last 10 years, soil in Detroit reached 50°F, the signal for crabgrass preventer, as early as Apr 7 (2021) and as late as May 2 (2022): 25 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 22) and first fall frost (Nov 7), the growing season lasts about 199 days.
| Year | Crabgrass window opened | Last spring frost | First fall frost |
|---|---|---|---|
| 2025 | Apr 19 | Apr 10 | Nov 10 |
| 2024 | Apr 10 | Apr 25 | Nov 29 |
| 2023 | Apr 12 | Apr 26 | Oct 31 |
| 2022 | May 2 | Apr 29 | Nov 14 |
| 2021 | Apr 7 | Apr 22 | Nov 3 |
| 2020 | Apr 29 | May 13 | Oct 31 |
| 2019 | Apr 23 | Apr 2 | Nov 6 |
| 2018 | May 1 | Apr 21 | Oct 16 |
| 2017 | Apr 10 | Mar 29 | Nov 8 |
| 2016 | Apr 17 | Apr 12 | Nov 12 |
Estimated from daily temperatures for Detroit. A dash means it didn't happen that year.
Frequently asked questions
When should I apply pre-emergent in Detroit?
In a typical year, between Apr 19 and May 4. 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 Detroit?
Early fall, typically Aug 24 – Oct 13, while soil cools from 65°F toward 50°F.
When is the last frost in Detroit?
The median last spring frost is Apr 22 and the median first fall frost is Nov 7 (2016–2025).
How long is the growing season in Detroit?
About 199 days, from the median last spring frost on Apr 22 to the median first fall frost on Nov 7 (2016–2025).
Lawn care guides
More Michigan lawn calendars
Nearby cities in other states
- Toledo, OH 53 miles away · crabgrass preventer Apr 19 – May 4
- Cleveland, OH 90 miles away · crabgrass preventer Apr 20 – May 3
- Akron, OH 117 miles away · crabgrass preventer Apr 13 – Apr 27
- Fort Wayne, IN 138 miles away · crabgrass preventer Apr 15 – Apr 28