One of the most common questions we get from homeowners across Perris, Menifee, and Moreno Valley is simple: how often should I run my sprinklers? The answer changes by season, by plant type, and by your soil — and getting it wrong in either direction costs you money.
Over-watering is actually the #1 irrigation mistake in Southern California. It wastes water, promotes shallow root growth, and encourages fungal disease. Under-watering causes stress, yellowing, and die-off during our hot summers. Here's the seasonal breakdown our team uses when programming controllers for customers throughout Riverside County.
Summer (June – September): Water More, But Smarter
This is when your lawn needs the most water — but not as much as most people think. During peak summer heat in the Inland Empire, temperatures regularly hit 100°F+, and evaporation is high.
- Lawns (fescue, Bermuda, St. Augustine): 3–4 days per week, early morning (5–8am)
- Shrubs and groundcover: 2–3 days per week with drip irrigation
- Trees: 1–2 deep waterings per week — trees prefer less frequent, deeper soaks
- Vegetable gardens: Daily or every other day, depending on sun exposure
Pro tip: Always water between 5am and 8am. Midday watering loses up to 30% to evaporation, and evening watering can promote fungal growth overnight.
Fall (October – November): Start Scaling Back
As temperatures drop and days shorten, your lawn's water demand drops significantly. This is the time to start stepping down your schedule. Most Inland Empire lawns do fine on 2 watering days per week in fall, with run times reduced by 20–30% compared to summer.
Winter (December – February): Minimal Watering
Cool-season grasses like fescue may stay green and actively growing through Southern California winters, while warm-season grasses like Bermuda go dormant. Either way, water demand is very low.
- Bermuda (dormant): Once every 2–3 weeks is usually sufficient
- Fescue (active): Once a week, or less if it rains
- Drip zones: Every 10–14 days for established plants
Important: Riverside County occasionally has mandatory water-day restrictions during drought conditions. A smart controller will automatically adjust to comply while keeping your lawn alive.
Spring (March – May): Gradually Increase
Spring is when most lawns wake up and growth picks up fast. Increase your watering schedule incrementally — don't jump straight to summer settings. Start at roughly 60% of your summer schedule in March and ramp up through May as temperatures rise.
The Easiest Fix: A Smart Controller
If adjusting your schedule seasonally sounds like a lot of work, a smart irrigation controller does it automatically. Systems like Rachio or Hunter Hydrawise connect to your WiFi and local weather data, adjusting run times daily based on temperature, rainfall, humidity, and evapotranspiration rates. Our customers who upgrade to smart controllers typically cut outdoor water use by 30–50%.
Want Your System Programmed Properly?
We set up and program irrigation controllers across Perris and the Inland Empire. Free quote, same-day service available.
📞 Call (951) 259-2100General Rules to Remember
- Water deeply and infrequently — this trains roots to grow deep and tolerate heat better
- Check your system monthly for broken heads, leaks, or misaligned sprinklers
- Rain shuts off your schedule — invest in a rain sensor or smart controller
- Sandy soils (common in parts of Perris and Nuevo) drain fast and need more frequent, shorter cycles
- Clay soils (common in Menifee and Murrieta) hold water longer — reduce run times to avoid runoff
When in doubt, do the screwdriver test: push a screwdriver 6 inches into your lawn. If it goes in easily, you have enough moisture. If it's hard to push, it's time to water.