The ideal sprinkler run time depends on several factors including the type of sprinkler, soil type, grass variety, climate, and watering goals. Here are general guidelines based on the most common sprinkler types and conditions:
- Spray sprinklers (pop-up or fixed spray heads): Typically run for about 10 to 20 minutes per zone. Spray heads deliver water faster and cover smaller areas, so they need shorter run times. For example, 10 minutes is common, but some sources suggest up to 20 minutes split into multiple sessions per week
- Rotor sprinklers (rotary or gear drive rotors): These cover larger areas with a lower flow rate, so they require longer run times, often around 20 to 45 minutes per zone. Rotor heads may need 30 to 45 minutes to deliver sufficient water, sometimes split into two or three sessions weekly
- Dripline and micro spray : These have lower flow rates and require longer run times, often 20 to 40 minutes, to deliver adequate water directly to roots
- Weekly watering amount : Lawns generally need about 1 to 1.5 inches of water per week. To achieve this, typical schedules involve running sprinklers 2 to 3 times per week, with each session lasting 20 to 30 minutes per zone depending on sprinkler type and soil
- Timing of watering : Early morning (around 4 to 6 AM) is the best time to water to reduce evaporation and fungal growth
- Soil and lawn conditions : Sandy soils drain quickly and may require more frequent watering with shorter durations, while clay soils hold water longer and need less frequent watering. Newly seeded or sodded lawns may need shorter, more frequent watering
In summary, a typical recommendation is:
- Spray heads: 10–20 minutes per zone, 2–3 times per week
- Rotor heads: 20–45 minutes per zone, 2–3 times per week
- Drip/micro spray: 20–40 minutes per zone, 2 times per week
Adjust based on your soil type, weather, and lawn condition to ensure about 1 to 1.5 inches of water weekly
