Lawn Care Dashboard
Fargo, ND ยท cool-season turf (Kentucky bluegrass / fescue)
As of August 9, 2026
Turf Growth Stage
Slow GrowthDaytime highs have averaged 82°F over the last 3 days - outside the peak ~60-75°F window, so growth is happening but slower than peak season.
Mowing
Hold off0.19" of rain in the last 2 days - let the ground dry out before mowing to avoid compacting wet soil and spreading disease. Once dry, expect to mow every 7-10 days at the current growth rate.
Fertilizing
Hold offCool-season turf doesn't need fertilizer during summer heat - feeding now can stress the lawn rather than help it.
Pre-Emergent
Missed windowTurf soil temperature is 71°F, at or above the ~55°F threshold where crabgrass begins germinating - the ideal window to apply before germination has likely passed. A product with early post-emergence activity may still help.
Mowing guidance above is frequency-based (how often, given current growth conditions and recent rain) - not a measurement of your actual grass height. Pre-emergent and fertilizer timing are keyed to real soil/air temperature and rainfall for Fargo, not a fixed calendar date.
Mowing Timeline
What this dashboard would have recommended each day, using only the data available at the time - a look back at whether a given day was actually a good idea to mow. Each day shows all four factors: Growth stage, Mowing, Fertilizing, Pre-emergent. Hover (or tap) a factor for details.
Forecast Projection Lower confidence
A tentative look ahead from NOAA's forecast air temperature - not NDAWN's observed data like the dashboard and timeline above. Same four factors as the timeline above, same badge colors - but growth stage/mowing skip the heat-dormancy and wet-ground checks (no reliable forecast rainfall amount exists, only a rain chance), and pre-emergent comes from a soil-temperature projection rather than a direct measurement. Treat this as a rough heads-up, not a firm recommendation.
References
- The Cool-Season Turfgrasses: Basic Structures, Growth and Development - Penn State Extension
- Grass development: Seasonal growth pattern of grasses - UC ANR IPM
- What is the One-Third Rule for Mowing Grass? - LawnStarter
- What Temperature Is Too Hot for Kentucky Bluegrass? - CoolSeasonGrass.com
- Mid-summer lawn care - University of Minnesota Extension
- Should You Mow the Lawn in a Heatwave? - Homes & Gardens
- Dakota Gardener: Applying fall lawn fertilizer in the northern Great Plains - NDSU Extension
- Crabgrass Management in North Dakota Lawns - NDSU Extension
- Using Growing Degree Days to Predict Germination - West Virginia University Extension
- Methods of Predicting Crabgrass Emergence - K-State Turf and Landscape Newsletter