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Arizona Watering Schedule: The Ultimate Homeowner's Guide for Grass, Trees, Plants & Cacti
- Oasis Green
- Jun 12
- 15 min read
Updated: 3 days ago
Affiliate Disclosure: Some links in this article are affiliate links. This means Oasis Green may earn a small commission if you purchase through these links at no additional cost to you. We only recommend products we believe may be helpful to Arizona homeowners.
Why We Wrote This Guide
After more than 30 years of designing, building and caring for landscapes across Gilbert, Chandler, Mesa, Queen Creek, and the rest of the Phoenix area, I've noticed something interesting: The biggest threat to a beautiful Arizona landscape usually isn't insects, poor soil, or even our 115-degree summers.
It's watering.
Not necessarily too little water.
Not necessarily too much water.
Just the wrong water- wrong timing, wrong duration, wrong frequency, or treating every plant in the yard exactly the same.
Almost every week we meet homeowners who tell us:
"I'm watering every day, but my plants or my lawn still look stressed."
Or:
"My neighbor waters half as much as I do, yet his grass always looks so much greener."
The truth is, watering in Arizona isn't intuitive. Even lifelong Arizona residents still ask me watering questions on a regular basis.
A schedule that works perfectly in April may stress your landscape in July. A timer that gets forgotten after summer can overwater your lawn throughout the winter. And two properties on the same street may need completely different watering schedules because of differences in soil, sun exposure, drainage, and plant selection.
Over the years, I've answered these questions thousands of times for our clients. Eventually, we realized we were repeating the same advice over and over.
So instead of answering those questions one homeowner at a time, we decided to create the guide we wish every Arizona homeowner had.
Whether Oasis Green built your landscape or not, our hope is simple: that this guide helps you keep your yard healthy, conserve water, avoid costly mistakes, and enjoy your outdoor space for years to come.
Before You Change Your Irrigation Timer…
One of the biggest misconceptions is that there is a single "correct" watering schedule for every Arizona yard.
There isn't.
The recommendations in this guide are proven starting points based on our experience and accepted watering practices, but every property is different. Soil type, plant variety, irrigation equipment, sun exposure, shade, slope, and even your neighborhood can affect how much water your landscape actually needs.
Think of this guide as a roadmap rather than a rulebook.
In my experience, the homeowners with the healthiest landscapes aren't necessarily the ones who water the most, they're the ones who pay attention, make seasonal adjustments, and understand what their plants are telling them.
Quick Reference: Arizona Watering Schedule
Just looking for a quick answer? Here's a general guide for established landscapes. Keep reading for detailed explanations, new plant schedules, and exceptions.
Landscape Item | Spring | Summer | Fall | Winter |
Established Bermuda Grass | Every 7-10 days | 2-3 times per week | Every 7-10 days | Every 20-30 days |
New Grass | Multiple short cycles daily during establishment | Multiple short cycles daily during establishment | Same as spring | Adjust for overseeding |
New Plants | 25-30 minutes daily | Up to 1 hour daily | 25-30 minutes daily | 25-30 minutes every other day |
New Trees | Deep soak every 2-3 days | Deep soak every 2-3 days | Deep soak every 2-3 days | Deep soak every 2-3 days (adjust as needed) |
Established Cacti | Minimal supplemental water | Deep soak occasionally during extreme heat | Minimal | Usually none unless conditions warrant |
Important: These are starting points, not absolute rules. Soil type, sun exposure, drainage, rainfall, and plant variety all influence how much water your landscape needs.
Why Watering in Arizona Is Different
People moving here from other parts of the country often assume watering is simple:
"It's hotter, so I should just water more."
Ironically, that's one of the fastest ways to create problems. Arizona doesn't simply have hot weather, it has an entirely different growing environment. Understanding that environment will make every watering decision easier.
Three Things Make Arizona Unique
1. Extreme Evaporation
Much of the water applied during a hot summer afternoon never benefits your plants because evaporation begins immediately. That's why I tell my clients early morning watering, typically between 4:00 AM and 6:00 AM, is almost always the best choice. The water has time to soak into the soil before the sun and wind begin working against you.
2. Our Soils Are Not All the Same
I've installed new landscape projects or done remodels multiple times for next door neighbors or neighbors across the street from each other. I can tell you that it is extremely common for two homes or even multiple homes on the same street to all have different watering schedules.
Some properties contain sandy soils that drain quickly. Others sit on heavy clay that holds moisture much longer. Many East Valley homes also encounter caliche, a naturally occurring hardpan that can prevent water from moving properly through the soil. I've done projects in neighborhoods on more than one occasion where even next door neighbors had differences in their soil quality.
That's why we always tell homeowners:
Don't just trust the timer, you have to also pay attention to your landscape.
3. Arizona Has Multiple Growing Seasons
A watering schedule that works beautifully here in February can stress your plants in July. Likewise, leaving a summer irrigation program running through winter often results in overwatering, wasted water, and unhealthy root systems.
One of the simplest things you can do for your landscape is adjust your irrigation controller several times throughout the year instead of setting it once and forgetting about it. Just think of it like your home's thermostat- what's comfortable in the winter will certainly not be sufficient in the middle of the summer.
Before We Talk About Grass...
One of the biggest misconceptions we hear is:
"If my lawn looks stressed, I should water it every day."
In reality, healthy Bermuda grass develops deeper roots when it is watered deeply and less frequently. Daily shallow watering often produces weaker root systems that struggle during Arizona's hottest months.
We'll explain exactly how to water new and established lawns in the next section.
Watering Grass in Arizona
Let's start with the part of the landscape most homeowners pay attention to first: the lawn. Ironically, it's also where we see the most watering mistakes, especially with my homeowners who recently relocated from other parts of the country and are used to vastly different watering methods in their home states.
Many people assume that because Arizona is hot, grass should be watered every day. In reality, healthy Bermuda grass prefers deep, thorough watering followed by time for the soil to dry. That's what encourages roots to grow deeper into the ground where moisture is more consistent.
Shallow daily watering may keep the surface green for a while, but it often produces a weak root system that struggles during extreme heat.
New Grass: The First Few Weeks Matter Most
A newly installed lawn hasn't developed an established root system yet. During this short establishment period, the goal is simple:
Keep the surface consistently moist while the roots develop.
Spring Installation of Sod (Approximately 70°-100°)
Immediately following installation, most new lawns should have three start times each day, typically:
6:00 AM
11:00 AM
4:00 PM
Each cycle generally runs 7-10 minutes, depending on your soil conditions.
After the first week, remove one of those daily start times. After the second week, remove another. Eventually, you'll transition to a single early morning watering cycle as the lawn becomes established.
Pro Tip: This frequent schedule is temporary. Many homeowners make the mistake of leaving it in place long after the grass has rooted.
Summer Installation of Sod (100° and Above)
Summer installations require more attention because evaporation happens so quickly.
Typical start times may include:
5:00 AM
9:00 AM
1:00 PM
5:00 PM
Each cycle generally lasts 10-12 minutes.
As with spring installations, begin eliminating one start time each week until you're left with a single early morning cycle.
Established Bermuda Grass
Once your lawn is established, the strategy changes completely.
Instead of frequent watering, the objective becomes:
Water deeply.
Water less often.
Encourage deeper roots.
General Watering Frequency
Season | Typical Schedule |
Spring | Every 7-10 days |
Summer | Three to five times per week* |
Fall | Every 7-10 days** |
Winter (dormant Bermuda) | Every 20-30 days |
*Summer watering starts when bermuda comes out of hibernation. This happens when night time lows stay above 70 degrees.
**Fall watering begins once night time termperatures consistently fall below 70 degrees.
If you've overseeded with winter rye, your watering schedule will differ once the rye becomes established. For a complete guide to the transition between Bermuda and rye, including when to scalp and overseed, be sure to read our dedicated article on When and How to Scalp and Overseed Your Arizona Lawn.
How Do You Know It's Time to Water?
Clients often ask how they will know when it's time to water. Besides paying attention to the trends of the temperatures outside, you also need to look at how your lawn is behaving.
Try the Footprint Test
Walk across your grass. If the blades spring back up, it usually doesn't need water yet.
If your footprints remain visible and the grass stays compressed, it's time to water.
Watch the Color
Healthy Bermuda will often change from bright green to a dull blue-green or gray tint before it begins showing obvious stress. That's another signal it's time to irrigate.
How Deep Should You Water?
One of the simplest tools you can own is a long screwdriver.
About 30 minutes after watering, push it into the soil.
If it slides in roughly 8-10 inches, you've probably watered deeply enough.
If it stops after only a few inches, your irrigation cycle likely needs adjustment.
Remember:
Grass doesn't develop deep roots because it's old. Grass develops deep roots because that's where it has learned to find water.
Watering New Plants and Shrubs in Arizona
One of the biggest surprises for new homeowners is that newly installed plants typically require more attention than established ones. Desert-adapted plants may eventually thrive with relatively little supplemental water, but they first need time to establish a healthy root system.
Think of a newly planted shrub like someone recovering from a move. Its roots have been confined to a container, disturbed during planting, and suddenly introduced to an entirely new environment. Consistent watering during this establishment period is critical.
Spring & Fall Watering Schedule (Approx. 70°-100°)
During spring and fall, newly installed plants should generally receive 25-30 minutes of watering per day. This schedule typically continues until the season changes significantly or the plants become established. Established plants can usually thrive with considerably less water, although soil conditions and plant variety should always be considered.
Summer Watering Schedule (100° and Above)
Arizona summers are extremely demanding on new plant material. During this period, new plants may require up to one hour of watering each day. Established plants often require less runtime and, depending on the species and soil conditions, may only need watering every other day. The goal isn't simply to wet the surface, it's to provide enough moisture for roots to establish themselves deeper in the soil.
Winter Watering Schedule (Below 70°)
As temperatures cool, plants naturally lose less moisture through evaporation and transpiration. A general guideline for newly installed plants is 25-30 minutes every other day. Established plants can often be watered every third or fourth day. As always, rainfall and individual site conditions should be considered before adjusting your irrigation schedule.
Watering Trees in Arizona
Trees are one of the best long-term investments you can make in your landscape. They provide shade, beauty, privacy, and even help reduce surrounding temperatures, but only if they establish healthy root systems during their first few years. Unlike lawns, trees generally prefer deep soakings followed by time for the soil to dry.
General Watering Guideline for New Trees
For most newly planted trees:
Water approximately 1½ hours
Water every second or third day
Adjust as needed based on soil conditions and tree variety
Shade trees often require different watering than desert-adapted trees, and sandy soils may require more frequent irrigation than heavy clay soils.
Why Watering Trees Deeply Matters
Tree roots naturally follow moisture. When watering is shallow and frequent, roots tend to remain close to the surface where temperatures fluctuate dramatically and soil dries quickly.
Deep watering encourages roots to grow downward where moisture is more stable, creating a stronger and healthier tree over time. Having a deep root system becomes especially important during monsoon season because the trees with the shallow roots are usually the first ones to be uprooted.
Watering Newly Transplanted Trees
During the first few months after planting, watering frequency gradually changes as the tree becomes established.
In general:
Time After Planting | Typical Watering Pattern |
First 2-10 days | Most frequent watering |
Days 10-30 | Slightly reduce frequency |
Days 30-90 | Continue tapering schedule |
Established | Water deeply as needed |
Container size, species, weather, and soil conditions all influence the exact schedule, so continue observing your tree rather than relying solely on the calendar.
Don't Judge a Tree by Its Leaves
Many homeowners become concerned when a newly planted tree drops some leaves after installation.
Throughout my extensive experience in the landscaping industry, I've often had to reassure clients not to immediately worry if they notice this- it's merely transplant shock. This is not an indication that their tree is dying or that it wasn't planted properly, simply that the tree is trying to figure out how to reajust to its new home (much like kids sometimes!). I've even had this happen to trees planted in my own backyard so I know it can be a little unsettling but the answer is usually just a little bit of patience.
My best advise when this happens is to avoid the urge to overwater. Excessive watering can be as harmful as insufficient watering. Instead, keep an eye on the soil, maintain a regular watering routine, and give the tree time to settle in.
A Quick Note About Citrus Trees
Citrus trees deserve their own discussion.
While many of the watering principles in this guide still apply, citrus has unique requirements for watering, fertilizing, pruning, frost protection, and long-term care. In Arizona, our citrus growing seasons differ significantly from those in other states, so I always ensure my clients understand the importance of sticking to recommendations tailored specifically for Arizona.
Rather than duplicate that information here, we've created a complete guide:
If you've recently planted a lemon, orange, lime, grapefruit, tangelo or other citrus tree then we highly recommend reading that article as well before making adjustments to your watering schedule.
Watering Cacti and Succulents in Arizona
The Biggest Myth About Arizona Cacti
If you've lived in Arizona for very long, you've probably heard someone say:
"It's a cactus. You never have to water it."
That's one of the biggest misconceptions we encounter and I'm still surprised how many people don't realize it.
The truth is that newly planted cacti and succulents absolutely need supplemental water while they establish themselves. Once they're mature and naturalized, many can survive with very little assistance, but getting them to that point requires a little patience and the proper watering schedule. Just because a plant is drought tolerant doesn't mean it's drought proof.
One Important Exception: Saguaros
Before we go any further, there's one major exception. Saguaros should not be watered after planting.
In fact, if daytime temperatures are below 90°F when a saguaro is planted, it should generally wait about a month before receiving any supplemental water at all. Everything else in this section applies to most other cacti and succulents, just not saguaros.
Newly Planted Cacti
Your first watering depends on the temperature at the time of planting.
If temperatures are above 90°F
Wait approximately one week before the first watering.
If temperatures are below 90°F
Wait approximately one month before the first watering.
Agaves are different
If temperatures are above 90°F, Agaves should generally be watered immediately after planting. If temperatures are cooler, they can wait about one month.
First Summer
During the first summer after planting:
Native cacti: deep soak every two weeks
Non-native cacti: deep soak every two weeks
During periods of extreme heat:
Agaves may benefit from weekly watering
First Winter
If daytime temperatures remain below 90°F:
Give native and non-native cacti one deep soak per month
However, there is one important condition:
Only water if your area has received less than one inch of rainfall during the previous 30 days.
If you've had sufficient rainfall, additional irrigation is generally unnecessary.
Second Summer
As plants become established, watering requirements begin to decrease.
Native cacti
One deep soak per month
Non-native cacti
Two deep soaks per month
Second Winter
By the second winter:
Native cacti
Generally require no supplemental watering
Non-native cacti
One deep soak per month
Third Year and Beyond
Most established native and non-native cacti are considered naturalized by this point.
Under normal conditions, they typically require little or no supplemental irrigation.
During periods of prolonged extreme heat and little rainfall, a monthly deep soak is still a reasonable practice.
What Is a "Deep Soak"?
Many homeowners assume that turning on a hose for a few minutes is enough.
It usually isn't.
A true deep soak means applying water slowly over an extended period, allowing moisture to penetrate deeply into the root zone rather than simply wetting the surface.
The larger the plant, the longer that process generally takes. The goal isn't to make the ground wet for today. The goal is to encourage healthy roots that will support the plant for years to come.
The 10 Biggest Watering Mistakes We See in Arizona
We've designed and built landscapes across the East Valley since 2006, and while every property is different, the same watering mistakes seem to happen over and over again. Avoid these common problems, and you'll be well ahead of most Arizona homeowners.
1. Leaving the Same Irrigation Program Running All Year
One of the biggest mistakes is setting the irrigation controller once and never adjusting it again. Arizona doesn't have one growing season, we have multiple seasons with dramatically different temperatures and evaporation rates. A schedule that works perfectly in April may underwater your landscape in July and overwater it in December. My recommendation: Take a few minutes several times a year to review your irrigation settings or if you have a maintenance company, ensure you ask if that's something they take care of.
2. Watering Too Frequently
Many homeowners think:
"If a little water is good, more water must be better."
Unfortunately, that's often the opposite of what happens. Frequent shallow watering encourages roots to stay near the surface, where soil dries quickly and temperatures fluctuate the most. Deep, less frequent watering generally encourages stronger and healthier root systems.
3. Watering Too Shallow
Getting the surface wet is not the same as watering properly. Grass roots, trees, and shrubs all benefit when water penetrates deeply into the soil rather than remaining in the top few inches. If you're unsure whether your irrigation is reaching the proper depth, I recommend you perform the screwdriver test described earlier in this guide.
4. Watering During the Heat of the Day
I have to regularly remind my clients, especially those who are newer to Arizona, that midday watering is working against Arizona's climate. High temperatures and wind increase evaporation before much of the water ever reaches the root zone. So, whenever possible, schedule irrigation for the early morning hours when evaporation is lowest. And if you're someone who travels or Arizona is your second home, I highly recommend getting an upgraded digital timer that can be accessed remotely from your phone. It's one of the best investments many Arizona homeowners can make.
One upgrade I recommend to every client who wants to have full control of their watering system is Hunter Hydrawise HPC400 Smart WiFi Irrigation Controller for Lawns and Gardens. It's a WIFI enabled smart controller that can be monitored remotely through an app. The beauty is that this controller automatically updates watering schedules based on local forecasts, which eliminates the need for my clients to make any manual changes.
5. Ignoring Your Soil Type
Not every yard behaves the same.
Sandy soils drain quickly.
Clay soils retain moisture much longer.
Caliche can dramatically affect drainage.
Remember, two homes on the same street may require different watering schedules simply because of what's happening beneath the surface.
6. Forgetting to Check Irrigation Equipment
Your irrigation system deserves occasional attention. Just a quick walk around your property every month can help prevent problems with the irrigation or water simply by being aware. Some of the things you want to look for:
Broken sprinkler or drip emitters
Missing sprinkler or drip emitters
Plugged or buried drip emitters
Leaking lines
Areas receiving uneven coverage
Sometimes a struggling plant isn't asking for more water, it simply isn't receiving the water your timer thinks it's getting.
7. Forgetting About Rainfall
Arizona may be dry most of the year, but monsoon storms can deliver significant amounts of water in a short period. If your landscape has already received substantial rainfall, consider whether your scheduled irrigation is still necessary before allowing the system to run. Again, if you travel or live elsewhere during parts of the year, this is another great reason to look into a timer that can be controlled remotely.
8. Assuming Every Plant Has the Same Needs
Your lawn, shrubs, shade trees, succulents, and cacti should not all be watered the same way. Grouping plants with similar water requirements into the same irrigation zones—a concept known as hydrozoning—makes watering more efficient and helps prevent overwatering one area just to satisfy another. This is a great question to ask your contractor about if you are having a new landscape project installed.
9. Ignoring Seasonal Lawn Changes
Bermuda grass behaves very differently throughout the year. If you overseed with winter rye, your watering schedule will change again. Likewise, transitioning back to Bermuda in spring requires different maintenance than simply leaving the winter schedule in place. If you're planning to overseed, be sure to read our article on When and How to Scalp and Overseed Your Arizona Lawn, where we walk through the entire process.
10. Assuming the Timer Knows Best
Your irrigation controller is a tool but it does not take the place of a gardener or landscape maintenance person.
Walk your property regularly.
Look at your plants.
Check the soil.
Pay attention to changes in weather.
The healthiest Arizona landscapes usually belong to homeowners who observe what their yard is telling them and make adjustments throughout the year rather than relying entirely on an automated schedule.
A Few Final Thoughts
The watering schedules in this guide are intended to be solid starting points, not absolute rules. Every yard is different, and factors like soil type, sun exposure, plant selection, drainage, and even your neighborhood can influence how much water your landscape actually needs.
The best landscapes we've seen over the years aren't necessarily maintained by homeowners who water the most but they're maintained by homeowners who pay attention, make seasonal adjustments, and learn what their landscape is telling them.
If your irrigation system simply needs seasonal adjustments or routine maintenance, a qualified landscape maintenance professional can help keep everything running properly.
But if you're planning a major landscape renovation, installing a new outdoor living space, replacing an outdated yard, or starting from scratch with a custom landscape design, we'd love the opportunity to help. Thoughtful plant selection, proper irrigation zoning, and intelligent design decisions made at the beginning can make your landscape easier to maintain and more enjoyable for years to come.
Since 2006, Oasis Green has been designing and building custom outdoor spaces for homeowners throughout Gilbert, Chandler, Scottsdale, Queen Creek, and the surrounding Phoenix area. We invite you to browse our project gallery, explore our other homeowner guides, and when you're ready to transform your outdoor space, we'd be honored to help bring your vision to life.
Oasis Green is an Arizona business and is Licensed, Bonded and Insured. Roc#227331
