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Metropolitan Water District Launches Turf Replacement Program for Sustainable Landscaping

The Metropolitan Water District of Southern California’s Turf Replacement program aims to update homeowners’ landscaping practices by encouraging the removal of existing grass and replacing it with organic, drought-tolerant alternatives. With a focus on water conservation and sustainability, the program seeks to combat the effects of water scarcity and promote responsible water usage among residents.

It is essential to note that synthetic turf is not an approved option for conversion under this program. Instead, the emphasis is on promoting organic and eco-friendly landscaping solutions that align with the city’s environmental goals.

Over 175 water-efficient plant and tree species are on display at the Padre Dam Municipal Water District Demonstration Garden. Photo: Padre Dam Municipal Water District

Experience a Sustainable Demonstration Garden Self-Tour

Sustainable landscape demonstration gardens inspire homeowners to create and maintain their own beautiful, water-efficient landscapes. In California, where more than half of urban water usage goes towards landscape irrigation, any reduction in water consumption contributes to successful conservation efforts.

The San Diego County Water Authority and several member agencies host demonstration gardens that residents can visit and gather ideas for their own landscape makeovers and water-efficient upgrades. With gardens flourishing in late spring, it’s the perfect time for a self-guided garden tour.

San Diego County Water Authority

The four principles of sustainable landscaping are on display at the San Diego County Water Authority's Sustainable Landscaping Demonstration Garden outside its headquarters in the Kearny Mesa area of San Diego. Photo: Water Authority

The four principles of sustainable landscaping are on display at the San Diego County Water Authority Sustainable Landscaping Demonstration Garden outside its Kearny Mesa office in San Diego. Photo: San Diego County Water Authority

The Water Authority sustainable landscape demonstration garden at its Kearny Mesa headquarters showcases how homeowners can increase water efficiency and boost the environmental benefits of outdoor spaces through sustainable landscaping practices.

The 3,000-square-foot garden incorporates well-known water-efficient techniques such as climate-appropriate plants and high-efficiency irrigation. It also includes features to enhance water efficiency and reduce stormwater runoff.

Helix Water District

Native, water-wise plants thrive in one of the Helix Water District's demonstration gardens. Photo: Helix Water District

Native, water-wise plants thrive in one of the Helix Water District’s demonstration gardens. Photo: Helix Water District

Helix Water District created its first demonstration landscape in July 2020 at the district’s administration office in La Mesa. The project beautifies the neighborhood and serves as an inspiration to install low-water-use landscaping.

Three unique water-wise gardens include a Mediterranean garden on University Avenue, a desert landscape on Lee Avenue, and a California native landscape at the main entrance on Quince Street. Each garden boasts an array of flowers, colors, and textures and is easily visible from the sidewalk. The plants in these gardens are adapted to San Diego’s climate, requiring half to a fifth of the water needed by a traditional lawn. The gardens, at 7811 University Avenue in La Mesa, are low maintenance and provide habitat for local wildlife.

The Helix Water District demonstration garden includes interactive elements such as descriptive signs with QR codes that visitors can scan to learn more about specific plants. Photo: Helix Water District

The Helix Water District demonstration garden includes interactive elements such as descriptive signs with QR codes that visitors can scan to learn more about specific plants. Photo: Helix Water District

Plant markers display each plant’s name so visitors can write down their favorites and a QR code that can be scanned with a smartphone to access additional information such as light and water needs. Visitors can access hwd.fyi/get-inspired to download the garden plans, obtain plant lists, and view several resources available to help start their own garden.

Olivenhain Municipal Water District

Customers can visit the California-friendly demonstration garden and hydroponic gardening tower at OMWD’s headquarters free any day of the year. Photo: Olivenhain Municipal Water District

Customers can visit the California-friendly demonstration garden and hydroponic gardening tower at OMWD’s headquarters free any day of the year. Photo: Olivenhain Municipal Water District

The Olivenhain Municipal Water District headquarters houses a sustainable landscape demonstration garden showcasing water-efficient landscaping techniques. Customers can visit the California-friendly demonstration garden and hydroponic gardening tower free of charge throughout the year, either in person or online.

The garden highlights four key principles of sustainable landscaping: healthy soils, rainwater as a resource, climate-appropriate plants, and low-water use irrigation. Its location is 1966 Olivenhain Road, Encinitas.

Padre Dam Municipal Water District

Over 175 water-efficient plant and tree species are on display at the Padre Dam Municipal Water District Demonstration Garden. Photo: Padre Dam Municipal Water District

More than 175 water-efficient plant and tree species are on display at the Padre Dam Municipal Water District Demonstration Garden. Photo: Padre Dam Municipal Water District

The Padre Dam Municipal Water District encourages East San Diego County residents to explore its water-efficient demonstration landscape to see more than 175 water-efficient plant and tree species.  Padre Dam’s Water Conservation Garden is open to the public during business hours and located at its Customer Service Center at 9300 Fanita Parkway in Santee.

City of Poway Kumeyaay Native Plant Demonstration Garden

Monkey Flowers, Chalk Dudleya, wild cucumber, and Penstamon are all blooming at the Kumeyaay Ipai Interpretive Center in Poway. Photo: Courtesy Kumeyaay Ipai Interpretive Center at Poway via Facebook demonstration garden

Monkey Flowers, Chalk Dudleya, wild cucumber, and Penstamon are all blooming at the Kumeyaay Ipai Interpretive Center in Poway. Photo: Courtesy Kumeyaay Ipai Interpretive Center at Poway via Facebook

The City of Poway honors its Native American heritage with its Native Plant Demonstration Garden as part of the Kumeyaay-Ipai Interpretive Center. It’s open the third Saturday of each month from 10 a.m. to 1 p.m. for both docent-led and self-guided tours, located at 13104 Carriage Road, Poway.

A thriving community of Native Americans populated Pauwai long before the Spanish arrived. The evidence of their lives and work can be seen today at the Center, founded by a partnership with the City of Poway, Friends of the Kumeyaay, and the San Pasqual Band of Indians.

A video tour showcasing Native American plant uses can be viewed online here.

Vallecitos Water District

In 2023, a Little Free Library was installed at the north end of the Vallecitos Water District garden, stocked with garden books to inspire residents to adopt water-wise gardening practices. Photo: Vallecitos Water District

In 2023, a Little Free Library was installed at the north end of the Vallecitos Water District garden, stocked with garden books to inspire residents to adopt water-wise gardening practices. Photo: Vallecitos Water District

The Vallecitos Water District developed its demonstration garden in 2010 with design plans from Palomar College Environmental Architecture and Design students. The project received support from local businesses, organizations, and District employees.

The garden showcases sustainable practices and includes a rainwater harvesting system that collects rain from the roof into three storage tanks with a combined 2,500-gallon capacity. This system reduces the reliance on potable water, and the captured rainwater is used for the prominent water features in the garden which run on solar power.

California-friendly plants are supported with plant-nurturing mulch, compost, and biosolid pellets made from recycled wastewater solids produced at a treatment plant partially owned by Vallecitos, the plants are bolstered with moisture and nutrients. This eliminates the need for chemical fertilizers.

The garden features a weather-based irrigation controller display, durable aluminum shade structures, dry riverbeds, artificial turf, micro-irrigation, and an artistic sculpture highlighting the value of water. A new private patio area has been added, and all pathways are now ADA-accessible.

Vallecitos’ sustainable demonstration garden has achieved recognition as a “Certified Wildlife Habitat” by the National Wildlife Federation in 2013 and has been acknowledged as a “Certified Earth Friendly Garden” by the Master Gardeners Association of San Diego County. In 2023, a Little Free Library was installed at the north end of the garden, stocked with garden books to inspire residents to adopt water-wise gardening practices. The garden is located at 201 Vallecitos De Oro, San Marcos.

The Water Conservation Garden

The Water Conservation Garden feature a Native Habitat Garden, the Compost Exhibit, the Veggie Garden and the Succulent Garden. Take a free, docent-led tour the first Saturday of each month at 10 a.m. Illustration: The Garden

The Water Conservation Garden features a Native Habitat Garden, the Compost Exhibit, the Veggie Garden, and the Succulent Garden. Take a free, docent-led tour the first Saturday of each month at 10 a.m. Illustration: The Water Conservation Garden

The Water Conservation Garden is a nearly five-acre display showcasing water conservation through a series of themed exhibits. Displays include a native plant garden and vegetable garden as well as how-to gardening and irrigation exhibits. Admission is free and the garden can be viewed on a self-guided tour or through one of its programs including classes and special events. The Water Conservation Garden is located at 12122 Cuyamaca College Drive West, El Cajon.

Rebates, resources, WaterSmart Landscape Contest winners

Using water efficiently is a way of life and responsibility in the San Diego region. Residents have adopted habits that not only save money, but also create vibrant yards, reduce energy use, protect natural resources, and reduce landscape maintenance.

In a 2007 survey published in The Journal of the American Association of Botanical Gardens and Arboreta, half of those surveyed during a visit to San Diego County’s Water Conservation Garden found reported making a change to their landscape due to their visit to the water conservation demonstration garden, illustrating their value to the community.

La Mesa resident Nick Voinov stands in front of his 2022 Helix Water District Landscape Contest winning yard. Photo: Helix Water District water efficient yard

La Mesa resident Nick Voinov stands in front of his 2022 Helix Water District Landscape Contest winning yard. Photo: Helix Water District

Along with the sustainable landscape demonstration gardens, many of the Water Authority’s member agencies provide opportunities for their customers to enter the annual WaterSmart Landscape Contest. The stories of the winners are regularly published in the Water News Network and can be found in the Features tab on the WNN homepage under the Conservation Corner category. The WaterSmart Living category, also under the Features tab, offers resources and tips on how to convert water-wasting landscapes to beautiful water-wise gardens.

(Editor’s Note: The Helix Water District, City of Poway, Olivenhain Municipal Water District, Padre Dam Municipal Water District, and the Vallecitos Water District are five of the San Diego County Water Authority’s 24 member agencies that deliver water across the San Diego region.)

Saving water-water bank-Conservation Cornerrainy day can be used later. Photo": Werner Jukel / Pixabay Bank your water savings

Bank Your Water Savings for the Future

Using landscape irrigation efficiently can significantly reduce overall household water consumption while leaving adequate water in the ground to cover your plants’ needs. One tool that can help is to build up your water savings when rainfall is available.

Approximately half of the water spent by average California homes is used outdoors, mostly for irrigation. Unfortunately, up to half of commercial and residential irrigation water is squandered by evaporation, wind, improper system design, or overwatering, according to the U.S. Environmental Protection Agency.

During the winter in metropolitan San Diego County, healthy soil can absorb water in surprisingly large quantities to be released slowly to plants as they use it during drier months – like using a savings account to pay for expenses over time.

There haven’t been many opportunities in recent years to do so. However, whenever it is possible, there is no need to use the residential water supply on your landscaping when Mother Nature can bank water savings deposits for you.

Balance your water bank account 

Maximize your landscaping soil's ability to retain and save rainfall and irrigation for drier days. Photo: D. Douk/Creative Commons

Maximize your landscaping soil’s ability to retain and save rainfall and irrigation for drier days by creating a water savings account. Photo: D. Douk/Creative Commons

Water entering the soil – whether as rain or as irrigation – is like a deposit into a soil checking account.

By keeping track of those transactions of water in and water out, it is possible to know how much water in the soil “reservoir” is available in the landscape at any given time for the plants to access.

The initial soil bank balance is determined by direct observation or is assessed after a thorough wetting of the soil by irrigation or winter rains. Every day, plants take small amounts of water from the soil. Rain and irrigation fill up the water bank again. The trick is to make sure this “account” does not get overdrawn.

How can you tell when the account is depleted? Smart irrigation controllers and landscape professionals can calculate this for you. You can also rely on a soil probe, or even testing the landscape by feeling the soil surface with your fingers.

When oxygen and water are balanced in the soil, the amount of water lost through evapotranspiration is similar to paying fees on your savings account. Shading the soil surface with plant materials and mulch protects water in the soil by slowing evapotranspiration and leaving more water in your soil’s account.

This article is part of a year-long series inspired by the 71-page Sustainable Landscapes Program guidebook. The Water Authority and its partners also offer other great resources for landscaping upgrades, including free WaterSmart classes at WaterSmartSD.org.

San Diego County, Water Authority Partner on Efficiency Rebates

Residents and businesses in unincorporated areas of San Diego County are eligible for increased water-use efficiency rebates under a partnership announced Aug. 17 between the county’s Watershed Protection Program and the San Diego County Water Authority.

The program could save money for residential, commercial and agricultural customers who make landscape upgrades designed to improve the region’s climate resilience and reduce the flow of pollutants into waterways.

“Drought conditions across the west are a reminder of the importance of water-efficiency upgrades, and these rebates offer a great opportunity to get involved,” said Kelley Gage, director of water resources for the water authority. “With a WaterSmart approach, we can reduce water-use and maintain climate-friendly landscapes that help sustain our quality of life in San Diego County.”

Compost-Conservation Corner-sustainability-WaterSmart-sustainable landscaping

Become a Compost Champion

Once your sustainable landscape makeover is in place, commit to best practices in maintenance. This includes regular composting.

Compost can also be used as mulch, applied directly to the soil surface. It can prevent erosion and help plants, and soil filter pollution, especially hydrocarbons and metals from road surfaces. Most greenwaste-based composts can be applied to a depth of three inches. Composted biosolids should be no deeper than two inches.

If you don’t produce your own compost on-site, it should be obtained from a reputable source that guarantees high quality. Commercially produced compost quality can vary significantly due to the diverse nature of feedstock, composting processes, and maturation standards.

Using compost as a soil amendment

For native plants in your sustainable landscaping, use roughly 15 percent compost by volume to repair disturbed or damaged soils.

Clay-based soil amended with compost will lead to more productive and healthy plant growth at a lower cost than amending the same soil with the necessary 45 percent sand.  In general, poor soils that are compacted, lifeless, or subsoils should be amended with three to six cubic yards or high-quality compost per 1,000 square feet to improve soil structure,

Biosolids-based composts should be used sparingly if they are high in ammonium nitrogen.

How do you know when it’s ready to use? Your compost is ready to use when it has an earthy smell, when it’s cooled off, and when it doesn’t reheat when stirred. The color should be uniformly dark brown or even black. You shouldn’t be able to identify any of the original particles.

This article is part of a year-long series inspired by the 71-page Sustainable Landscapes Program guidebook. The Water Authority and its partners also offer other great resources for landscaping upgrades, including free WaterSmart classes at WaterSmartSD.org. 

California Drought Could Lead to Mandatory Water Restrictions Reinstated Statewide

Even on an overcast, dewy day at the beach, drought conditions are of concern.

In July, Governor Gavin Newsom urged everyone across the state to cut their water use by 15%, but some water experts say that may not be enough.

“For us in San Diego County, we live in an arid region and we should be really behaving like we live in a drought 365 days of the year,” said Ian Monahan said, director of marketing and philanthropy for I Lova A Clean San Diego, an environmental non-profit focused on zero waste.

Check Before Overwatering Your Landscaping

Do you know if your landscaping really needs water? Even if you have waterwise irrigation on a properly timed schedule for your individual landscaping plan, it’s a good idea to make sure it’s really needed. You could be wasting water assuming it’s necessary. Appearances can be misleading.

Overwatering-drought-landscaping-Conservation Corner

Check Before Overwatering Your Landscaping

Do you know if your landscaping really needs water? Even if you have waterwise irrigation on a properly timed schedule for your individual landscaping plan, it’s a good idea to make sure it’s really needed. You could be wasting water assuming it’s necessary. Appearances can be misleading.

Rely on data from an old-school method of measurement. Because soil may appear dry on the surface, stick your finger into the soil and see if the soil is wet beneath the surface. If the soil is moist up to your second knuckle, it doesn’t need any more water. Wait for another 24 to 48 hours, then recheck the soil.

If you don’t want to ruin a manicure, use a soil probe to measure the moisture in the soil to determine whether the soil needs more water.

You can also observe plant health. How vibrant are your plants? This can be tricky because sometimes the signs of overwatering and underwatering will produce similar results in plants.

Watering your plants by hand is a great way to control exactly how much water they receive and observe them closely to be sure they are flourishing in the early stages.

Watering your plants by hand is a great way to control exactly how much water they receive and observe them closely to be sure they are flourishing in the early stages. Photo: Jill Wellington/Pixabay

Underwatering symptoms include:

  • Soil is bone dry
  • Older leaves turn yellow or brown and drop off
  • Leaves are wilted
  • Leaves curl and become brittle
  • Stunted plant growth

Overwatering symptoms include:

  • Soil is constantly saturated and soggy
  • Leaves turn a lighter shade of green, or turn yellow
  • Younger plant shoots wilt
  • Leaves are green and brittle
  • Algae and mushrooms are in the soil
  • Growth is excessive

Rely mainly on objective measurements. Symptoms at both irrigation extremes can be similar. Using simple measurement tools can help ensure the correct amount of irrigation takes place without withholding needed moisture, but without overwatering and wasting resources.

This article is part of a year-long series inspired by the 71-page Sustainable Landscapes Program guidebook. The Water Authority and its partners also offer other great resources for landscaping upgrades, including free WaterSmart classes at WaterSmartSD.org.

Carefully selected trees are the most valuable addition to your sustainable landscaping. Photo: Helix Water District landscape trees

Trees: Landscaping MVP (Most Valuable Plant)

New waterwise landscaping represents a significant investment in time and cost. Trees stand out as the most valuable players in your landscape design. No other landscape plant offers greater benefits to your landscape and the environment as a whole.

Trees save energy and clean the air.  They counteract the urban heat island effect and fight climate change. Trees provide property protection and improve property values. Neighbors with more trees even have lower crime rates.

Investing in tree maintenance is vital to keep them healthy. Tree pruning should only be done for a specific reason. First, for corrective or preventative measures.  Second, to remove dead, crowded, or poorly angled branches or to reduce potential hazards. Third, to increase light and air penetration for healthy growth.

Tips from pros on pruning and thinning trees

Trees are the most valuable players in your landscape design, and you can keep them healthy by using proper pruning techniques. Photo: Benjamin Balazs/Pixabay

Trees are the most valuable players in your landscape design, and you can keep them healthy by using proper pruning techniques. Photo: Benjamin Balazs/Pixabay

Routine thinning does not always improve the health of a tree. Removing large amounts of foliage all at once can put stress on a tree’s stored energy reserves, resulting in stunted growth.

Pruning should be performed in the best season for the tree to avoid potential disease and to avoid pruning just after the spring growth flush.

There should be a purpose for each cut, as each cut into a tree can change the growth of the tree for many years to come. Improper or careless pruning can cause damage over the life of the tree. It is important to know where and how to make cuts before beginning the process.

When a tree branch is cut, it compartmentalizes the wound to protect itself. A small cut does less damage than a large cut. Waiting to prune a tree until it is mature can create the need for large cuts, which can threaten the life of the entire tree. Ongoing and regular maintenance is a must.

Call on a certified arborist to maintain your trees in optimal health. Arborists are specialists trained in the art and science of planting, caring for, and maintaining individual trees. They can identify and treat diseases before they spread to other trees. Find qualified professionals at the International Society of Aboriculture and the American Society of Consulting Arborists.

This article is part of a year-long series inspired by the 71-page Sustainable Landscapes Program guidebook. The Water Authority and its partners also offer other great resources for landscaping upgrades, including free WaterSmart classes at WaterSmartSD.org. 

Getting Professional Guidance on Your Sustainable Landscaping

With the help of resources such as the San Diego County Water Authority’s WaterSmart Landscape Makeover classes, video on demand, and Sustainable Landscape Guide, many homeowners feel prepared to create a beautiful new sustainable landscape on their own.

But sometimes, it’s a smart idea to call on professionals trained in different aspects of the watershed approach to landscaping. With a little help, you can ensure the success of your project. For your investment, you will likely save time and money by avoiding unsuccessful efforts.