Bloomington, IN Lawn Care Calendar
In a typical year, put down crabgrass preventer in Bloomington between Apr 1 and Apr 24. The best time to overseed is between Aug 18 and Oct 7. The last spring frost usually comes around Apr 13. Most lawns here are cool-season grass (tall fescue, Kentucky bluegrass, ryegrass).
Typical lawn care dates in Bloomington
| 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 1 – Apr 24 |
| Spring fertilizerA light feeding once soil warms past 55°F and the grass is actively growing. | Apr 17 – May 22 |
| 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. | Sep 11 – Nov 12 |
Median dates, 2016–2025, from NOAA weather data for Bloomington. This year's dates can differ by a few weeks.
Month-by-month lawn care in Bloomington
- JanuaryNo treatments due; mow as needed.
- FebruaryNo treatments due; mow as needed.
- MarchNo treatments due; mow as needed.
- AprilCrabgrass preventer (pre-emergent)Spring fertilizer
- MaySpring fertilizer
- JuneNo treatments due; mow as needed.
- 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 Bloomington by month
Average soil temperature 4 inches down, estimated from 2016–2025 weather. It bottoms out in January at 30°F and peaks in July at 76°F. Crabgrass preventer goes down when it reaches 50°F, usually around Apr 1.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 30°F | 34°F | 44°F | 53°F | 63°F | 72°F | 76°F | 74°F | 70°F | 58°F | 45°F | 36°F |
Bloomington lawn timing, year by year
Over the last 10 years, soil in Bloomington reached 50°F, the signal for crabgrass preventer, as early as Feb 21 (2017) and as late as Apr 23 (2018): 61 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 13) and first fall frost (Nov 1), the growing season lasts about 202 days.
| Year | Crabgrass window opened | Last spring frost | First fall frost |
|---|---|---|---|
| 2025 | Apr 15 | Apr 12 | Nov 10 |
| 2024 | Mar 5 | Apr 7 | Nov 22 |
| 2023 | Apr 4 | Apr 25 | Oct 31 |
| 2022 | Apr 13 | Apr 10 | Oct 18 |
| 2021 | Mar 24 | May 8 | Nov 3 |
| 2020 | Mar 28 | May 10 | Oct 16 |
| 2019 | Apr 6 | Apr 3 | Nov 1 |
| 2018 | Apr 23 | Apr 30 | Oct 19 |
| 2017 | Feb 21 | Mar 24 | Oct 30 |
| 2016 | Mar 9 | Apr 13 | Nov 13 |
Estimated from daily temperatures for Bloomington. A dash means it didn't happen that year.
Frequently asked questions
When should I apply pre-emergent in Bloomington?
In a typical year, between Apr 1 and Apr 24. 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 Bloomington?
Early fall, typically Aug 18 – Oct 7, while soil cools from 65°F toward 50°F.
When is the last frost in Bloomington?
The median last spring frost is Apr 13 and the median first fall frost is Nov 1 (2016–2025).
How long is the growing season in Bloomington?
About 202 days, from the median last spring frost on Apr 13 to the median first fall frost on Nov 1 (2016–2025).
Lawn care guides
More Indiana lawn calendars
Nearby cities in other states
- Louisville, KY 76 miles away · crabgrass preventer Mar 11 – Apr 7
- Owensboro, KY 102 miles away · crabgrass preventer Mar 11 – Apr 10
- Cincinnati, OH 108 miles away · crabgrass preventer Mar 21 – Apr 19
- Champaign, IL 112 miles away · crabgrass preventer Apr 10 – Apr 26