LawnWeather

Meridian, ID Lawn Care Calendar

In a typical year, put down crabgrass preventer in Meridian between Apr 5 and May 7. The best time to overseed is between Aug 6 and Sep 25. The last spring frost usually comes around Apr 19. Most lawns here are cool-season grass (tall fescue, Kentucky bluegrass, ryegrass).

Typical lawn care dates in Meridian

Crabgrass preventer (pre-emergent)
Apr 5 – May 7
Spring fertilizer
Apr 30 – Jun 4
Overseeding & seeding
Aug 6 – Sep 25
Fall fertilizer
Sep 10 – Nov 5
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 5 – May 7
Spring fertilizerA light feeding once soil warms past 55°F and the grass is actively growing.Apr 30 – Jun 4
Overseeding & seedingLate summer to early fall: seedlings need about 6–10 weeks of growth before the first frost.Aug 6 – Sep 25
Fall fertilizerThe most important feeding for cool-season grass, from early fall until soil cools to about 45°F.Sep 10 – Nov 5

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

Month-by-month lawn care in Meridian

  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)Spring fertilizer
  5. MayCrabgrass preventer (pre-emergent)Spring fertilizer
  6. JuneSpring fertilizer
  7. JulyNo treatments due; mow as needed.
  8. AugustOverseeding & seeding
  9. SeptemberOverseeding & seedingFall fertilizer
  10. OctoberFall fertilizer
  11. NovemberFall fertilizer
  12. DecemberNo treatments due; mow as needed.

Soil temperature in Meridian by month

Average soil temperature 4 inches down, estimated from 2016–2025 weather. It bottoms out in January at 32°F and peaks in July at 76°F. Crabgrass preventer goes down when it reaches 50°F, usually around Apr 5.

JanFebMarAprMayJunJulAugSepOctNovDec
32°F36°F44°F50°F58°F67°F76°F75°F66°F54°F42°F33°F

Meridian lawn timing, year by year

Over the last 10 years, soil in Meridian reached 50°F, the signal for crabgrass preventer, as early as Mar 15 (2017) and as late as Apr 28 (2023): 44 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 19) and first fall frost (Oct 20), the growing season lasts about 184 days.

YearCrabgrass window openedLast spring frostFirst fall frost
2025Mar 25Apr 6Oct 28
2024Mar 20May 1Oct 25
2023Apr 28Apr 21Oct 28
2022Mar 26May 11Oct 24
2021Apr 19Apr 13Oct 14
2020Apr 21Apr 18Oct 23
2019Apr 5May 2Oct 6
2018Apr 21Apr 19Oct 15
2017Mar 15Apr 16Oct 10
2016Apr 3Mar 29Oct 12

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

Frequently asked questions

When should I apply pre-emergent in Meridian?

In a typical year, between Apr 5 and May 7. 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 Meridian?

Early fall, typically Aug 6 – Sep 25, while soil cools from 65°F toward 50°F.

When is the last frost in Meridian?

The median last spring frost is Apr 19 and the median first fall frost is Oct 20 (2016–2025).

How long is the growing season in Meridian?

About 184 days, from the median last spring frost on Apr 19 to the median first fall frost on Oct 20 (2016–2025).

Lawn care guides

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

More Idaho lawn calendars

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