That seasonal change matters for more than compliance. Las Vegas landscapes generally need less water as summer heat begins to ease, and continuing to irrigate on a summer schedule can waste water, encourage shallow roots, create runoff, and increase the risk of irrigation problems.
Whether your property has grass, desert landscaping, mature trees, shrubs, or a combination of landscape types, September is the right time to review your irrigation settings and make sure every zone is operating efficiently.
What Is the Las Vegas Fall Watering Schedule?
According to the Southern Nevada Water Authority and Las Vegas Valley Water District, the mandatory fall watering schedule runs from September 1 through October 31. During this period, sprinkler irrigation is limited to three assigned days per week.
Your assigned days depend on your watering group:
| Watering Group | Fall Watering Days |
|---|---|
| A | Monday, Wednesday, Friday |
| B | Tuesday, Thursday, Saturday |
| C | Monday, Wednesday, Friday |
| D | Tuesday, Thursday, Saturday |
| E | Monday, Wednesday, Friday |
| F | Tuesday, Thursday, Saturday |
Sunday sprinkler watering is prohibited year-round. If you are unsure which group your property belongs to, you can use the SNWA watering group finder or check your water bill.
Why You Should Change Your Irrigation Clock in September
One of the most common irrigation mistakes in Las Vegas is leaving a controller on the same schedule for too long. A program that made sense during July heat can become excessive as temperatures begin to moderate.
Reducing irrigation frequency in fall can help:
- Prevent unnecessary water use
- Reduce runoff into streets and sidewalks
- Limit oversaturation around plant roots
- Reduce stress caused by constantly wet soil
- Expose hidden leaks or poorly adjusted zones
- Prepare your system for the lower winter watering schedule
If your controller is difficult to program, loses settings, runs zones at the wrong time, or no longer matches the way your landscape is designed, fall can also be an excellent time to consider an irrigation system upgrade in Las Vegas.
Grass and Desert Plants Should Not Be Watered the Same Way
A properly designed irrigation system separates plants according to their watering needs. Grass, trees, shrubs, and desert plants should not all be placed on identical watering schedules.
Grass and Sprinkler Zones
Grass typically requires more frequent irrigation than established desert plants. During the fall schedule, sprinkler watering must remain within your three assigned days. SNWA recommends using a cycle-and-soak approach so water has time to penetrate the soil rather than running off the property.
For many sprinkler systems, that means breaking the total watering time into several shorter cycles instead of running one long continuous cycle. The exact runtime should still be adjusted for the sprinkler type, soil conditions, slope, turf condition, and water pressure at your property.
Drip Irrigation for Trees and Shrubs
Drip-irrigated plants and trees generally need water less frequently than grass. SNWA recommends drip watering plants and trees about two days per week during fall, although newly installed plants and special landscape conditions may require a different approach.
What matters most is deep, effective irrigation rather than frequent shallow watering. If emitters are clogged, broken, undersized, or positioned incorrectly, simply increasing the number of watering days may not solve the problem. Our recent guide on Las Vegas drip irrigation checkups explains several common problems to look for.
5 Irrigation Problems to Check When You Change the Schedule
Changing your controller is also a good opportunity to inspect the entire irrigation system. Before assuming your fall program is set correctly, watch each zone operate and look for these common problems.
1. Broken or Missing Drip Emitters
A missing emitter can waste water in one area while leaving a nearby plant without enough moisture. Broken fittings and small tubing leaks can also be difficult to notice until water begins pooling.
2. Sprinkler Overspray
Sprinkler heads should irrigate turf, not sidewalks, driveways, walls, or streets. Overspray wastes water and can stain hardscape or contribute to slippery surfaces.
3. Water Running Off the Property
Las Vegas soil can absorb water slowly. If water begins flowing into the street before the cycle is finished, shorter watering cycles with soak periods between them may improve absorption.
4. Zones With Different Plant Needs
Mature trees, new shrubs, ornamental plants, and grass may require very different amounts of water. Poorly designed irrigation zones often cause one area to be overwatered while another remains too dry.
5. An Aging Irrigation Controller
Older controllers can be difficult to adjust as seasons change. Modern smart irrigation controllers can simplify seasonal scheduling and give homeowners more control over zones, runtimes, and watering days.
Should You Install a Smart Irrigation Controller?
For many Las Vegas properties, a smart controller is one of the most practical irrigation upgrades available. Instead of relying on an outdated timer with limited programming options, a modern controller can make it easier to manage separate landscape zones and seasonal watering changes.
A smart irrigation system can be especially useful when your property includes a combination of:
- Grass and desert landscaping
- Established and newly installed plants
- Large trees with dedicated drip zones
- Front and backyard irrigation zones
- Sloped areas or difficult soil conditions
Smart technology does not replace proper irrigation design, however. A controller cannot fix broken drip lines, poor pressure, clogged emitters, incorrectly sized valves, or landscape zones that were designed improperly.
Fall Is Also a Good Time to Reevaluate Your Landscape
If your irrigation system is constantly being repaired because it supports an outdated landscape, the better long-term solution may be to redesign the landscape itself.
Replacing high-maintenance areas with drought-friendly plants, efficient drip irrigation, decorative rock, pavers, or carefully planned artificial turf can reduce ongoing maintenance while creating a landscape better suited to Southern Nevada.
Fall is also one of the best seasons to begin that work. See our guide to fall landscape renovations in Las Vegas for more information.
Frequently Asked Questions About the Las Vegas Fall Watering Schedule
When does the fall watering schedule begin in Las Vegas?
The fall schedule begins September 1 and continues through October 31. During this period, sprinkler irrigation is limited to three assigned days per week.
Can I water on Sunday?
Sprinkler watering on Sunday is prohibited in Southern Nevada throughout the year.
How often should I run drip irrigation in fall?
SNWA recommends watering plants and trees on drip irrigation about two days per week during fall. Actual watering needs can vary depending on plant type, maturity, soil, emitter flow, and recent installation.
How do I find my assigned watering days?
You can find your watering group through the SNWA watering group tool or by reviewing your water bill. Groups A, C, and E water Monday, Wednesday, and Friday, while groups B, D, and F water Tuesday, Thursday, and Saturday during fall.
What happens after October 31?
The winter watering schedule begins November 1. Winter restrictions generally reduce sprinkler irrigation to one assigned day per week, making late October another important time to update your irrigation controller.
Official Southern Nevada Watering Resources
Watering requirements can change, and individual properties may have unique circumstances. For the current mandatory schedule, watering-group information, and conservation guidance, visit the Southern Nevada Water Authority seasonal watering schedule.
Need Help With Your Las Vegas Irrigation System?
Following the Las Vegas fall watering schedule is easier when your irrigation system is designed correctly and every zone is working as intended. If you have leaks, inconsistent watering, outdated controls, poor coverage, or an irrigation system that no longer matches your landscape, Chicago Landscape of Las Vegas can help.
Since 2012, we have helped homeowners and property owners throughout Las Vegas and Henderson improve landscapes for Southern Nevada’s demanding climate.
- FREE on-site landscape consultations
- A+ BBB Rated Business
- Licensed and insured Nevada C-10 landscaping contractor
- SNWA Water Smart Contractor
- Drip irrigation installation and repair
- Smart irrigation controller upgrades
- Landscape redesign and water-efficient conversions
Learn more about our Las Vegas irrigation services, or contact Chicago Landscape of Las Vegas to schedule your free on-site consultation.
Contact us today to make sure your landscape is ready for fall and your irrigation system is operating efficiently.