September 8, 2023

Urban Tree Equity: The Drive to Fair Access

Introduction As the sun blazes on another hot summer day, the thermometer on the east side of town is likely to display the same number as its counterpart three miles west — but this doesn’t tell the whole story. The way we experience heat, particularly in developed urban areas, is influenced by a number of... More

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August 25, 2023

The Limitations of Structural Soil: Why It’s Not the Best Solution for Expanding Total Soil Volume

Introduction The space constraints of dense city environments present a challenge for project planners implementing an urban forestry element. There are, however, a number of solutions to help improve conditions for healthy tree growth. The Silva Cells are one such choice, a suspended-pavement system allowing for maximum soil volume. Another option is structural soil —... More

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August 22, 2023

Using Silva Cells with Green Roofs and On-Structure Applications

Silva Cells and On-Structure Installations The DeepRoot Silva Cell system has been installed in dozens of rooftop and on-structure projects around the world. Whether on top of existing structures — such as parking garages — or a garden terrace atop a new construction project, Silva Cells can help create structure as well as bioretention for... More

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August 11, 2023

Tree Watering Bags: Are They Worth Using?

In the July 2019 issue of ISA Arboriculture & Urban Forestry magazine, Hossain, Stuhlinger, Olson, and Babst contributed, “A Comparison of Indirect Water Devices for Benefiting Newly Transplanted Urban Trees.” Urban trees often undergo a period of post-transplant stress which is exacerbated by a water-limited environment. Watering devices are available to help a newly planted... More

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July 27, 2023

Comparing Silva Cells and Structural Soil

We get asked to compare Silva Cells to CU Soil with some frequency. It’s a comparison that we always hesitate to make, because to us it’s really a case of apples and oranges. While they may seem to be solutions to the same challenges, there are some very significant differences that affect their value and performance for tree growth... More

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July 26, 2023

Silva Cells Support Trees at Bomber Command Memorial

Introduction “The fighters are our salvation but the bombers alone provide the means of victory.” Winston Churchill’s words from September 1940 were prophetic, an early forecast of the indispensable role these aircraft would play in the triumph over Nazism in World War II. Dedicated to the courageous veterans of the Bomber Command, a bronze memorial... More

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July 24, 2023

Royal Tyrrell Museum: Dinosaurs and Silva Cells

Introduction It’s August 12, 1884, and geologist Joseph Tyrrell — on the hunt for coal seams in Alberta’s Red Deer Valley — discovers something far different: the first dinosaur fossil ever found in the region, later named the Albertosaurus for its geographical lineage. A hundred years later, the Tyrrell Museum in Drumheller, an homage to... More

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July 18, 2023

What a Difference Soil Volume Makes!

One of the chief advantages of the Silva Cell system is its ability to provide a robust soil environment for city trees — but why is this beneficial in the growth of healthy urban forests? Simply put, trees need adequate soil volume to properly grow: the more, the better. As we’ve discussed previously, roots are... More

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June 1, 2023

Why Investing in Mature Tree Growth is Beneficial for Cities: A Financial and Environmental Case

Introduction Trees play an invaluable role in enhancing city environments, providing everything from energy savings to climate-change mitigation. But it’s important to remember that not all urban forests are created equal — and evaluating trees by their quantity as opposed to their quality is to display a fundamental misunderstanding of city trees’ potential worth. Healthy,... More

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