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Ask Jim: “Won’t we eventually have to remove the soil and the tree?”

Here is this week’s “Ask Jim Urban” column. Jim Urban, FASLA is an expert on urban trees and soils and his recent book, Up By Roots, is the industry bible on these topics. Jim was also involved in the...

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Kaua’i: Where a Plant Nerd Vacations

Are you a plant nerd? Don’t be ashamed, you’re not alone, and there’s a place for us: Kaua’i, The Garden Island. Here, a few highlights from my recent trip there. This heavy statue is supported by...

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Why Pavement Heaving Isn’t a Problem With Silva Cells

Roots can disturb pavement in their search for pockets of air and water. Flickr credit: elycefeliz We know a lot about the problems and headaches that pavement disturbed by roots can cause. For a long...

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Ask Jim: “Might the trunk flare grow so large that is alters the soil...

Here is this week’s “Ask Jim Urban” column. Jim Urban, FASLA is an expert on urban trees and soils and his recent book, Up By Roots, is the industry bible on these topics. Jim was also involved in the...

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The Landscape of My Childhood

This is the block I grew up on, on Manhattan’s Upper West Side. My building is the white one with the green awning on the right. There are many physical markers of the long process of growing up: the...

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Pros and Cons of Using Aggregate to Store Stormwater

Flickr credit: BOBX-NC Most designers are probably already familiar with the practice of using aggregate or gravel as a form of underground stormwater storage.  For those who aren’t designers, the...

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Ask Jim: “Are other rain water treatment options better than Silva Cells?”

Here is this week’s “Ask Jim Urban” column. Jim Urban, FASLA is an expert on urban trees and soils and his recent book, Up By Roots, is the industry bible on these topics. Jim was also involved in the...

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What’s Missing From the Top 10 Cities for Urban Trees

Trees in Denver, CO. Flickr credit: tracktwentynine A few weeks ago, non-profit American Forests released their list of the 10 Best Cities for Urban Forests. Many deserving cities made the list, but to...

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The History of Street Trees: “This will be easy!”

Tree lined street Bao’an Shenzhen China. Flickr credit: dcmaster I have been wanting to write about the history of street trees. When I sat down to begin my research, I started in the usual place:...

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Ask Jim: “Will Silva Cells improve or be replaced with a better system?”

Here is this week’s “Ask Jim Urban” column. Jim Urban, FASLA is an expert on urban trees and soils and his recent book, Up By Roots, is the industry bible on these topics. Jim was also involved in the...

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“Up By Roots” Seminar at Morris Arboretum April 17th, 2013 from 9am to 4pm

Hey, Philadelphia-area readers! James Urban, FASLA will be presenting his “Up By Roots” seminar at the Morris Arboretum at the University of Pennsylvania on Wednesday, April 17th from 9am to 4pm. The...

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The Advantages of Permeable Pavers Installed Over Silva Cells

Permeable pavers were used over Silva Cells on a project along Aurora Avenue in Shoreline, WA. Image courtesy of Otak. There are many advantages to using permeable pavers over Silva Cell installations....

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The Myth of Root-Filled Stormwater Drain Pipes

Flickr credit: Sue Waters Disturbance to pipes and sidewalks caused by roots is one of the most commonly cited complaints about trees. One of the many questions I get asked about is whether they...

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On “Protecting New York As An Ecosystem”Testimony from Dr. Franco Montalto, PE

Could wetlands help protect Manhattan from extreme rain events?Image courtesy of Architecture Research Office and dlandstudio Today’s blog entry is reprinted testimony from Dr. Franco Montalto, PE,...

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The Role of Trees and Plants in Bioretention

Flickr credit: Betta Silva Cells were originally developed to provide adequate tree rooting volumes even in areas dominated by pavement. They do do this by extending rootable soil volume under HS20...

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Impressive Tropical Trees from a Visit to Kaua’i

 Ancient survivor This tree (Pandanus tectorius) has many names, including Hala and Screw-pine, but my favorite is Tourist Pineapple, because the fruits fool unsuspecting visitors. This primitive...

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Why Did We Use That Plastic?

Polypropylene pellets. Image via hwitc.com We spend a lot of time at DeepRoot talking about the big picture of “green infrastructure,” but in order to assist in creating viable and sustainable urban...

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Five Recent UK Silva Cell Installations

It’s been a while since we’ve shared some recent Silva Cell installations. Today’s round up is all projects from the U.K.! Pictured above is the Hadyn Ellis Building at Cardiff University. This...

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Durham, NC Sets Minimum Soil Volume for Street Trees

A oak tree on the Duke University campus in Durham, NC. Flickr credit: Alex Sandifer Welcome to the club, Durham! The minimum-soil-volumes-for-street-trees club, that is. Durham’s recently released...

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Toronto Captures Rain on Downtown Streetscape Silva Cell Case Study: Bloor...

Trees planted in Silva Cells along Bloor Street in 2012 Toronto has one of the most ambitious urban forestry plans in North America. In addition to setting minimum soil volumes for street trees of 30...

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