TurfDial · 2 tools
Watering
Irrigation is one of the most common places where home lawns get over-managed. Watering on a fixed schedule — same days, same duration, every week — ignores the fact that a lawn's actual water needs change with temperature, humidity, wind, and sunlight. The same schedule that's adequate in a cool cloudy week is under-watering during a July heat wave and over-watering in September.
Overwatering pushes roots shallow, starves the soil of oxygen between cycles, and creates humid conditions in the canopy that favor fungal disease. Consistent underwatering through summer heat causes stress, browning, and increased vulnerability even in drought-tolerant species. Neither is what you're trying to do when you set a schedule once and forget it.
The right approach is to match run-time to evapotranspiration (ET): the amount of water the turf canopy and soil surface are losing to heat and atmospheric demand. ET is weather-driven and changes day to day. Calculating it correctly requires knowing your sprinkler system's precipitation rate — how many inches per hour it delivers across the coverage area — and the actual ET demand for your location and conditions.
The tools here will give you the run-time to replace what your lawn actually lost — a number tied to real weather data, not a fixed timer setting.
Turn your weekly water target into actual minutes per zone — using your system's measured precipitation rate. Catch-can helper and cycle-and-soak guidance included.
Open tool →Lawn Watering Cost CalculatorSee what your lawn watering actually costs — gallons and dollars per week and per season, from your own water rate. Pairs with Sprinkler Run-Time for the minutes.
Open tool →Guides
- Cycle and Soak: Why Watering in One Long Run Mostly Runs Off
Soil infiltration rate — not your timer — determines how long you can run a zone before water stops soaking in and starts running off. Splitting runtime into cycles gets your target depth into the root zone instead of down the curb.
- Deep and Infrequent: The Watering Rule Everyone Quotes and Few Apply Correctly
'Deep and infrequent' is a real principle, but the cliché skips the part that matters: how much water, and how do you translate that into actual minutes per zone? Here's how to tie your schedule to evapotranspiration and stop training shallow roots.
- What Your Lawn Actually Costs to Water — Turning Minutes Into Dollars
One inch of water over a 5,000 sq ft lawn is roughly 3,100 gallons, every week. Here's the acre-inch conversion behind that number, why it's usually most of a summer water bill, and the honest gap between what you pump and what the turf receives.