The most important part of watering is figuring out how deep you need to water your plants. Once you figure that out, you can easily follow our chart that tells you how often to water.
Here are six simple steps to figuring out your watering depth:
Step 1: Water your landscape for the usual amount of time. If it’s the first time you’re watering, start with the number of minutes found in this Irrigation Advice Chart.
Step 2: Wait 24 hours after watering so the water has a chance to percolate into the soil.
Step 3: Grab a measuring tool, such as an 18” depth screwdriver, soil probe, barbecue skewer or 24” long piece of rebar, and probe your tool into an area you didn’t water to check the soil resistance. Next, go to an area that you watered the day before. Push the probe in until it stops. It should go in fairly easily. Don’t try to push it in further once it stops because you can accidentally break a pipe. Mark the spot it went into with your finger, tape or a permanent marker. Pull out the probe and measure the number of inches. Those inches represent your current watering depth. Using the Seasonal Watering Recommendations chart you can find out the depth you need for your type of plant.
Step 4: Adjust your watering time to correctly determine the watering depth. Did you only water 4” but needed a 12” watering depth? If so, then add more time to your watering schedule and perform the test again. Did you water 24” but only needed 18”? If so, then subtract time from your watering schedule. Water again and wait 24 hours to retest.
Step 5: Once you figure out the amount of time you need to water so the water penetrates to the correct soil depth, you are set.
Step 6: Set your controller for the correct amount of time. Use our handy Seasonal Watering Recommendations chart to see how often you’ll need to water your plants.
Don’t overthink it. Our local, desert-friendly plants (native and adaptive plants typically found in our local nurseries) usually thrive in our native soil.
Learn more by checking out these other useful drip irrigation articles:
Author: Jill Brown, ASLA, is a Landscape Architect and owner of My Landscape Coach in Albuquerque, NM. Have A question about the article? AskAnExpert@abcwua.org
Since the Albuquerque area receives about 9” of rain on average per year and grass lawns can use up to 50” of water per year, the proper design of an irrigation system for a grass lawn is of utmost importance when it comes to water efficiency. Irrigation efficiency can save up to 30% of the water you use by avoiding water waste.
While the Water Authority does not encourage grass lawns, we understand that some homeowners may want to install new lawns or reduce the size of their existing lawns. If you are going to have a turfgrass lawn, we recommend that it’s a lawn you use and not just maintain for curb appeal. Proper irrigation layout and design are key to having a healthy and water-efficient lawn.
When designing your lawn, keep these tips in mind:
1) Lawns smaller than 10’x 10’ are hard to water with a spray irrigation system.
2) To get the most efficient irrigation coverage, design square and rectangular lawns since sprinkler heads spray in fixed patterns-such as a quarter circle, half circle or full circle-but not curves. If curves are necessary, broad curves have the best chance of being irrigated without over spraying, while zigzag narrow curves are the toughest to irrigate effectively.
3) We recommend using WaterSense Pressure Regulating Spray Sprinkler Bodies.
WaterSense labeled spray sprinkler bodies with internal pressure regulation can reduce water waste by providing a consistent flow at the sprinkler nozzle. When the sprinkler body maintains pressure near its optimal operating pressure, the connected nozzle is better able to generate the right amount of water spray and coverage for a more uniform distribution of water across the landscape. Customers can choose from a list of pre-qualified spray sprinkler bodies.
4) We also recommend using High-Efficiency Rotating Sprinkler Nozzles (multi-stream). These nozzles minimize water waste and feature a unique multi-trajectory rotating stream that delivers water at a steady rate. This slower application allows water to gently soak in at rates that soils can absorb. Use these nozzles to replace the sprinkler head on any conventional spray head body or pop up sprinkler. For more information on these nozzles read this post.
5) Irrigation sprinkler nozzles are designed for 100% overlap of watered areas, which means each sprinkle nozzle throws water to the next sprinkler in all directions. If a system is not built this way, there will be dry spots (see the below image).
Designing, reducing and changing the shape of your lawn doesn’t have to be an expensive project but it can save a lot of water. Visit your favorite local irrigation supply store for professional equipment and expert advice.
Learn more by checking out these other useful irrigation articles:
Author: Jill Brown, ASLA, is a Landscape Architect and owner of My Landscape Coach in Albuquerque, NM. Have a question about the article? AskAnExpert@abcwua.org
We are living in a time when our climate is going through rapid changes. Winter days have gotten warmer, and very cold nights are decreasing in number. The decrease in snowpack and early snowmelt that volatilizes before it soaks into the soil are creating drier watersheds, which are vulnerable to fires that can affect our water quality. Reduced snowpack affects streamflow. In order to take care of our Albuquerque landscapes, we need to rely on groundwater. When there’s a lack of precipitation, groundwater recharge is adversely affected. Less precipitation also means drier soils with little reserve moisture to maintain existing vegetation. Even if precipitation amounts don’t diminish, warmer temperatures affect evaporation rates from plant leaves and add to water stress. Supplemental irrigation demand is going to surge to maintain healthy landscapes. We need to implement adaptation strategies, like proper plant selection and smart watering methods, to make climate-ready landscapes a reality in Albuquerque.
We can prepare our landscapes for hotter summer daytime temperatures and warmer winters by following these strategies:
Shade surfaces: Plant trees and large shrubs against walls and near concrete to buffer sunbaked paving and cool walls that absorb heat during the day. By doing this, temperatures can be reduced by five degrees in urban areas.
Plant climate-ready trees: Check out the Climate Ready Tree list. This science-based list of trees that are most likely to survive our changing climate was put together by a diverse group of plant professionals. In mid-century, Albuquerque is projected to become as hot as El Paso, Texas. By the end of this century, our climate will become like present-day Tucson, Arizona.
Mulch everything:Mulchinsulates plant roots from both heat and cold, reducing moisture loss from the soil by evaporation, feeding beneficial soil microorganisms that enhance plant growth and improving soil health. Install 3-4” of mulch over bare dirt to reduce weeds, to enrich the soil and around all new plants to retain the moisture.
Remove or reduce turfgrass lawns: Lawns require 40 inches of water a year, compared with the 8 inches that Albuquerque gets. The greatest value of a cool- season turf is its resilience as a play surface, so if you aren’t regularly using it, consider removing it or installing a low-water grass or meadow.
Incorporate smart irrigation practices: Smart irrigation devices like smart controllers adjust the watering times based on local weather, thus saving water. Drip irrigation delivers water directly to plants. Efficient rotary spray heads reduce water use by 30% or more compared with regular spray heads.
By using these climate-ready practices, it will take less water to create a greener city, support wildlife and keep our community cooler.
Learn more by checking out these other useful drought articles:
Author: Judith Phillips, owner of Design Oasis, landscape designer, and garden writer with 30 years of experience designing arid-adapted and native gardens in the high desert. Have a question about the article? AskAnExpert@abcwua.org
One of the biggest obstacles holding homeowners back from removing their high-water turfgrass and installing xeriscape is believing that setting up the irrigation system is difficult. Luckily, it is not as hard as you may think.
If you have an automatic irrigation spray system, you already have an existing valve and, most likely, an AVB backflow preventer. It may look something like this.
Desert Friendly Xeriscape with spray to drip conversion.
The first thing to do before converting to drip is to get the valves checked out by a professional to make sure they are in working order. When you know they’re fine, add a pressure regulator filter combo just past the existing valve and backflow preventer. Then attach ¾”polyline, snaking it around the yard to the new plants and inserting flag emitters at each plant.
The existing underground piping and spray heads are no longer needed. Simply remove all the existing spray heads. There is no need to dig up any existing pipe.
You may have seen the spray-to-drip retrofit kits locally available and wonder if this is a good approach. We don’t recommend this approach because studies show that nearly half of the water saved from converting a lawn to a healthy xeriscape comes from abandoning leaky underground piping and fittings. A Sprinkler system’s lifespan is less than 20 years. If you are not sure how old your system is, or if it is older than 10 years, it’s best to not rely on old underground piping. Since sprinklers typically run for 8-12 minutes and drip often runs for 45-60 minutes, if you have a leak in your old sprinkler piping and it is now part of the drip system you could be wasting a ton of water – negating the savings from getting rid of your thirsty lawn.
Drip irrigation tubing is very inexpensive per foot and only needs to be in a shallow trench. Properly converting to drip irrigation is not as expensive as many people think, while converting your sprinklers to drip the cheap and easy way with a retrofit kit is likely to cost more in the long run.Contact AskAnExpert@abcwua.org to learn more.
Learn more by checking out these other useful drip irrigation articles:
Author: Amos Arber, Xeriscape Rebate Inspector with the Water Resources Conservation Department for the Water Authority. Have a question about the article? AskAnExpert@abcwua.org
Baby, it’s cold outside. Or is it? How do you water during the cold and dry winter season?
The weather predictions are in, and we are headed into a very dry La Niña winter season. This means we need to water our plants this winter in order to keep them healthy. Due to our freezing temperatures we recommend turning off your irrigation system for the season and using your hose to water once a month during the middle of a warm winter day.
Watering Tips:
For cool season grass lawns, thoroughly water every other week.
For deciduous and evergreen trees, lilacs, photina’s, euonymous, rose of Sharon, spirea and forsynthia, water once a month to 24” deep.
Author: Richard Perce, Irrigation Efficiency Specialist with the Water Conservation Department for the Water Authority. Research: Farmers Almanac, Drought Watch New Mexico State. Have a question about the article? AskAnExpert@abcwua.org
What is a smart irrigation controller and why would you want one as a gift? The Water Authority’s irrigation efficiency specialist Richard Perce says, “While an irrigation controller is a must for your landscape, a smart controller adjusts your watering based on the local weather conditions. This saves you time and water!” Many smart controllers use WiFi and connect to the local weather station. They will not water on days when it’s too windy or it has already rained. Most will also determine what your landscape’s water needs are and create a schedule based on data added during setup and the information it receives from local weather stations. Many also connect to your smartphone or tablet so you have easy control over your system no matter where you are.
Below, Richard has listed some of his favorite controllers for this holiday season. Why not be practical this year for gift giving?
Features: 6 and 12 zone options, inexpensive, connects to local weather stations, easily controlled via your smartphone, can be mounted indoors or outdoors, works with all internet modems (2.4gh and 5gh), long-range Bluetooth radio, can adjust both at the controller and on your phone, easy to use, rebates available.
Features: 8 and 16 zones options, inexpensive, connects to local weather stations, easily controlled by a smartphone, works with all modems, easy to use, robust water schedules based on plant type, soil type, sun exposure, rebates available.
Rainbird ST8-2.0 WiFi Smart Irrigation Timers Features: 8 zones and more, connects to the local weather station, easily controlled at the box and by smartphone, works with all modems, robust watering schedules, fully customizable, rebates available.
Author: Richard Perce, Irrigation Efficiency Specialist with the Water Conservation Department for the Water Authority. Have a question about the article? AskAnExpert@abcwua.org
