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Volunteers participate in the City of San Diego's Arbor Day tree planting event in 2023. Photo: City of San Diego

Celebrate Arbor Day: Discover How San Diego’s Tree Planting Programs Combat Climate Change and Save Water

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With climate change creating new challenges for managing safe and reliable water supplies, trees are increasingly recognized and relied on for their importance in helping mitigate weather extremes and contributing to water conservation efforts.

Trees are among the most valuable investments in San Diego County’s landscape – including your own waterwise landscaping. No other landscape plant plays a more significant role in fighting climate change and managing a healthy watershed.

National Arbor Day on Friday, April 26, presents an opportunity to call attention to the benefits of planting trees. Several Arbor Day promotions and ongoing programs in San Diego County offer support for planting trees, including rebates and volunteer events that let you contribute to the effort to provide more trees.

New Tree Rebate Program Launched By Metropolitan Water District

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

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

The Metropolitan Water District of Southern California launched a new rebate program in March, offering residents and businesses $100 for each eligible tree planted in their yards to replace thirsty grass for more sustainable landscaping.

Metropolitan’s new “tree-bate” provides incentives for up to five trees in residents’ and businesses’ turf replacement projects. The district partnered with TreePeople and local water agencies to identify and recommend trees with lower water use that are appropriate for Southern California’s climate.

Learn about this new rebate and existing rebates at the Be Water Wise website.

SDGE Community Tree Rebate Program

San Diego Gas & Electric offers a tree planting guide through its rebate program. Photo: SDGE arbor day

San Diego Gas & Electric offers a tree planting guide through its rebate program. Photo: SDGE

The San Diego Gas & Electric’s (SDGE) Community Tree Rebate Program for Residential Customers allows qualifying residential customers throughout the region to plant trees that provide environmental, health, and economic benefits.

Qualifying customers can receive a $25 rebate for planting or potting a one-gallon tree, a $35 rebate for a five-gallon tree, and a $50 rebate for a 15-gallon tree. Customers can apply for up to five rebates annually. Customers do not need a yard to qualify. Trees can be planted in large containers on outdoor balconies or patio areas.

City of San Diego Arbor Day Event

Volunteers are needed for an Arbor Day event to help plant trees at Memorial Community Park. Photo: City of San Diego

Volunteers are needed for an Arbor Day event to help plant trees at Memorial Community Park. Photo: City of San Diego

On Arbor Day, the City of San Diego’s Urban Forestry Program hopes to plant 100 new trees at Memorial Community Park in Logan Heights. It needs volunteers to help with planting, prepping soil, spreading mulch, and cleanup. Learn more and sign up using this link.

Throughout the year, City of San Diego residents can request a new street tree through Free Tree SD. This program allows residents and the City to work together by increasing San Diego’s tree canopy cover. Residents need to identify a space in the public right-of-way and agree to water the tree for three years. City arborists will evaluate the space and determine an appropriate tree selection. Fill out the Free Tree SD application form on the City’s website to get started.

City of Escondido Celebrates Arbor Day 2024

The City of Escondido needs volunteers to help plant 120 trees for Arbor Day on Saturday, April 27, from 8:30 a.m. to 11:30 a.m. Meet at the House of Prayer Lutheran Church, 795 N. Rose Street. Trees will be planted from Oleander Place to Fern Street between Lincoln Avenue and Mission Avenue. Volunteers of all ages are welcome and are asked to wear comfortable clothing for getting dirty, close-toe shoes, and a hat. Sunscreen is highly recommended. Register on the City website.

City of Vista Residential Tree Giveaway Program

The City of Vista now offers a new Residential Tree Giveaway Program. This initiative is available to Vista residents who own property or have permission from the property owner to plant a tree on the premises. The program is first-come, first-served, and available as long as the funds last. Increasing the local tree canopy on private properties enhances wildlife habitat, mitigates the effects of climate change, and supports the City’s Climate Action Plan goals.

Applications are available now. Since this is a pilot program, it is only available as long as funds last. It was funded through a $50,000 year-end fund balance request, approved by the City Council at the end of 2023. The application form is on the City of Vista website.

County of San Diego Tree Planting Program

The County of San Diego surpassed its goal of planting 10,000 trees in 2023 by adding 11,010 trees, including 5,744 new trees planted at County parks and facilities, 1,637 trees planted through non-government organizational partnerships, and 3,629 trees planted by incorporated cities. The Board of Supervisors has budgeted funds to plant 4,000 trees through spring 2024.

The County has a tree plotter to help staff track tree inventory and plantings regionwide. Residents can participate by reporting trees they plant on their own. Visit the County’s Tree Plotter web page to get started.

The Role of Trees In Preventing Climate Change

Healthy trees fight climate change and cool our cities, provide habitat, and improve the health of our neighborhoods. Photo: Kampus Production / Pexels

Healthy trees fight climate change and cool our cities, provide habitat, and improve the health of our neighborhoods. Photo: Kampus Production / Pexels

The hydrological cycle heavily relies on trees to absorb water in the atmosphere. Trees act as water reservoirs, taking in water from the soil and releasing it through their leaves, a process known as transpiration. The added moisture in the air leads to rainfall and the continuation of the water cycle.

Tree root systems filter and remove pollutants and slow down water absorption into the soil. This process helps to prevent erosion and reduce the risk of over-saturation and flooding.

Trees provide cooling to increasingly hot neighborhoods and cities, and they are among the most efficient tools for removing harmful carbon dioxide that fuels global warming.

San Diego forestry and landscaping professionals work with the San Diego County Water Authority and its 23 member agencies to help protect our region’s trees while conserving water. Find more resources at the Kate Sessions Trees website.

Make Your Landscape Trees a Priority During This Record Drought

/in , , /by /Times of San Diegoby Editor Mentioned: San Diego County Water Authority

As the unprecedented drought continues to affect California and the San Diego region, homeowners can still balance the need to conserve water as efficiently as possible while preserving valuable landscaping, including trees.

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Make Landscape Trees a Priority During Drought

/in , , /by /Water News Network Mentioned: San Diego County Water Authority

As the unprecedented drought continues to affect California and the San Diego region, homeowners can still balance the need to conserve water as efficiently as possible while preserving valuable landscaping, including trees. Trees can be maintained while following California’s water guidelines.

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Even the strictest drought restrictions allow for watering trees on residential and commercial properties. Photo: Helix Water District landscape trees

Make Landscape Trees a Priority During Drought

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As the unprecedented drought continues to affect California and the San Diego region, homeowners can still balance the need to conserve water as efficiently as possible while preserving valuable landscaping, including trees.

Trees can be maintained while following California’s water guidelines. Trees are among the most valuable investment in San Diego County’s landscape – including your own WaterSmart landscaping. No other landscape plant offers more significant benefits to your landscape and the environment. Trees provide much-needed shade and cooling to increasingly hot neighborhoods and cities and are among the most efficient natural ways to remove harmful carbon dioxide fueling global warming.

When mature trees die due to lack of irrigation, they become a dangerous fire hazard. They are expensive to remove. Young replacement trees take many years to provide the benefits of mature trees. Taking care of your trees during drought ensures a tremendous return on this investment.

Long, deep soaks maximize irrigation use

Even when not in an acute drought, trees planted in a Mediterranean climate often need some additional water. Mimic the way Mother Nature provides water for the most effective irrigation.

Healthy tree roots reach three to four feet deep at the outer edge of a tree’s branches, where rainfall would naturally run off leaves. This area at the edge of the tree canopy is called the drip line.

Prolonged, slow soaking

When it does rain, Mother Nature’s rainfall is primarily steady, slow, and spread out. Follow this method to deliver a prolonged, slow soaking. Trees prefer infrequent deep watering. During drought, slow watering every two or three weeks for more established trees is sufficient. Avoid runoff with multiple cycles to allow water to soak deeply. Irrigate early in the morning to minimize evaporation.

Keep in mind turf competes with your trees for water. Even if you want to retain some lawn, it’s smart to remove the lawn immediately around your trees and replace it with WaterSmart landscaping.

Protecting trees from climate change

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

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

Drought is a reality in the San Diego region as average temperatures increase. As summer months become hotter, soils dry out. Trees must be deep watered to supply their roots and preserve their health.

San Diego forestry and landscaping professionals are working with the San Diego County Water Authority and its 24 member agencies to help protect our region’s trees while also conserving water. Find more resources and learn more at drought.katestrees.org.

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WaterSmart Living-Logo-San Diego County Water Authority

(Editor’s Note: The San Diego County Water Authority and its 24 member agencies offer programs, resources, and incentives to improve water-use efficiency for residential, commercial, and agricultural users. WaterSmart choices are a way of life in the region. Stay WaterSmart San Diego! For more water-use efficiency resources, go to WaterSmart.SD.org. The Helix Water District is one of the San Diego County Water Authority’s 24 member agencies that deliver water across the metropolitan San Diego region.)

Pasadena Water and Power Plans to Ratchet Up Water Restrictions: Once a Week Watering Beginning September

/in , , /by /Pasadena Nowby Keith Calayag

Pasadena Water and Power is planning to step up water conservation efforts beginning this September as California slips deeper into drought.

Speaking to members of the Municipal Services Committee on Tuesday, July 13, PWP Interim General Manager Jeffrey Kightlinger said the agency will soon propose the implementation of a level 3 Water Supply Shortage Plan, which would limit watering days to one day per week.

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The Importance of Watering Trees During the California Drought Seasons

/in , , /by /Spectrum News 1

Trees are a very essential part of California’s infrastructure, with some of them taking 20 to 30 years to mature. Despite the drought, watering these important resources remains vital.

“We don’t want to put them at risk for various diseases because they’re not getting enough water. The tree tends to get used to the amount of water that’s there in the area. So as we dial back watering our lawns, we have to be aware that we might be stressing the tree that’s gotten used to the watering that we previously were doing,” Chief Sustainability Officer of StreetsLA Greg Spotts told “Inside the Issues” host Alex Cohen.

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SoCal Needs to Keep Vital Trees Alive Despite Unprecedented Watering Restrictions

/in , , /by /Los Angeles Timesby Jaimie Ding

The lowly sidewalk tree often stands invisible. We rest in its shade, bask in the scent of springtime flowers, and we don’t notice it until it’s gone.

But the tree works hard. It captures and filters stormwater runoff and helps replenish groundwater. It cleans our air and cools our neighborhoods. It improves our mental health. It saves lives.

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San Diego Tree Week: Concerts and Free Trees

/in , , /by /Water News Network Mentioned: San Diego County Water Authority

The Water Conservation Garden is celebrating Spring this year by launching San Diego Tree Week. The goal, from April 22-29, is to plant 1,000 trees and bring San Diego residents together through tree planting.

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Borrow Tree Watering Tips from Mother Nature

/in , , /by /Water News Network

As drought continues to affect California, homeowners must balance two needs: preserving landscaping with irrigation while doing so as efficiently as possible to conserve water.

Even when not in a drought, trees planted in a Mediterranean climate often need additional water. For the most effective irrigation, mimic the way Mother Nature provides water.

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A large tree's roots are concentrated at the dripline, not at the trunk. This is where you should irrigate the tree through a slow release technique. Photo: Hans Braxmeier, Pixabay tree watering tips

Borrow Tree Watering Tips from Mother Nature

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As drought continues to affect California, homeowners must balance two needs: preserving landscaping with irrigation while doing so as efficiently as possible to conserve water.

Even when not in a drought, trees planted in a Mediterranean climate often need additional water. For the most effective irrigation, mimic the way Mother Nature provides water.

Nature designed trees so rain would fall on the leaves and run off to the sides of the tree – much like rain hits an umbrella and rolls down off the side. It falls in a circle around the perimeter.

When irrigating trees, this same approach provides the most moisture to roots and maximizes water use. This outer edge around a tree where rain falls is called the drop line. This is where the tree sends out its most vigorous feeder roots to soak up available moisture. Using a hose to water at the trunk of trees doesn’t reach many of the roots.

Focus on slower, infrequent tree watering

Focus on longer, slower delivery of water than mimics a long, light rainfall. Photo: Ulrike Leone

When it does rain, Mother Nature’s rainfall is primarily steady, slow, and spread out. Borrow this method to deliver a long, slow soaking. Trees prefer infrequent deep watering. Once a week or less for more established trees is sufficient.

Water in a slow drip away from the trunk, long enough to soak the top 12 inches of soil in the drip line. Use a hose on a very slow trickle, a soaker hose, drip irrigation in the proper areas, or this clever method.

Use a five-gallon bucket with small holes to slowly release water to a tree’s deepest roots. Photo: Sacramento Tree Foundation

Use a five-gallon bucket and poke several holes in the bottom. Put the bucket on top of the soil along the drip line. Fill the bucket with water. The water will seep out slowly and deeply into the soil. When it’s empty, move the bucket about three feet away, and repeat the process. Do this until you have made a circle in the drip line around the tree.

You can fill the bucket with water gathered in your daily shower. In a household with several people, you may be able to fill a five-gallon bucket daily. Water early in the morning or after sunset, so you lose less water to evaporation. This is when trees gather moisture naturally.

If you have hard, rocky ground, drill holes one foot deep every three feet around the tree along the drip line. Fill the holes with compost, and then pour water into them. This vertical mulch will encourage the roots to grow.

Finally, bear in mind turf competes with your trees for water. Even if you want to retain some lawn, it’s smart to remove the lawn immediately around your trees and replace it with WaterSmart landscaping.