At the end of last month, Mayor Gavin Newsom announced the launch of the Better Market Street Project. Market Street, one of San Francisco’s largest thoroughfares, is at once both a main artery of the city and one of its biggest messes. Congested traffic and mass transit, confusing pedestrian and bike crossings, pathetic (PATHETIC) street trees… More
By L. Peter MacDonagh, RLA, ISA and Leda Marritz “Without trees, a city is just a scab on the earth.” – Chuck Gilstrap It is hard to imagine any creation as wild or as fanciful as what can be found in nature. One way or another, the natural world is where the shapes and inspiration… More
By Rebecca Stevens I recently read a blog illustrating the Leidenfrost Effect (whereby liquids glide on cushions of vapor) by sticking one’s hand in liquid nitrogen. The pictures are amazing as is the video. You are probably wondering why we are talking about the Leidenfrost Effect on the DeepRoot blog.
Click here for a general overview of the factors that influence how deep tree roots grow. Or, continue reading below to dig in to the science a bit deeper. By James Urban, FASLA Here’s an objection we face a lot when working on Silva Cell projects: “Tree roots don’t grow more than 24″ (65 cm)… More
Earlier this year we wrote about San Francisco’s crowd-sourced tree census project (so neat). And there’s a lot that you can contribute to this project without knowing that much about trees… nonetheless, if you would like to be able to identify more trees more easily (I know I do) then you may want to start… More
Last we checked, the trees in suspended pavement at the Bartlett Tree Lab were doing awesome at 5.5 years. Growing season 6 photos are in and they still look great! (Structural Soil twig on the left, Suspended Pavement twig on the right).
This blog post is reprinted from Landscape Architecture Resource, where it was originally published in January 2009. Is a street tree a utility? Concern over sustainable design has many developers, designers, and consumers beginning to consider trees as “green utilities.” Advocates of sustainable design are also urging that the integration of other “green utilities” like… More
In areas where it snows and freezes, salting is a frustrating reality of the road. Salt used for melting ice on pavements in northern climates is quite harmful to trees and soil. The most common and least expensive form of ice melting salt is sodium chloride, which is the same salt we put on our… More
Every so often I’ll read a take on an important and relevant topic that means well, but just leaves me scratching my head. Such was the case with a recent article in Toronto’s The Star about planting street trees. Let’s start with the title, “Tree-Lined Streets Not Worth the Cost, Arborists Say” — eeeek!
Back to laboring over here at Deep Root HQ. Mike James, of Deep Root Canada Corp., snapped this picture in Vancouver over the weekend. Looks like an group called the Stick Shift Project — “a collaborative act of urban transformation” — has taken the engines and other guts out of four cars and replaced them… More
This blog post is reprinted from Landscape Architecture Resource, where it was originally published in April 2009. Urban and suburban places all over the world are experiencing unnecessary flooding and pollution because their heavily-compacted urban soils simply can’t manage the rate, quality and volume of storm water as effectively as needed. “Nearly all of the… More
Have you ever heard of a Master Arborist? I only recently became aware of this designation after a colleague of mine told me about a seminar she’d attended with one. She knows a lot about trees, but even she had plenty to learn from the Master Arborist leading this talk.
Soil. Stormwater. Sustainable Infrastructure.
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