Many factors affect tree health. Are they all equally important or are some more important than others? According to Kim Coder, soil compaction is by far the biggest constraint on tree growth. In a 2007 paper, he wrote, “Soil compaction is the most prevalent of all soil constraints on shade and street tree growth…Many people… More
A large-canopy tree is a very beautiful thing. On this, most people will agree. But is not only beautiful—it also benefits its community. It provides shade and shelter, protects air quality, and reduces air temperatures, water runoff, and human stress. A street lined with such trees is a desirable place to live and work, and… More
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 development and design of the Silva Cell system. In this column, which we’ll be running once a… More
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 principle is simple: aggregate (gravel) is full of small voids – macropores – that can fill with water, acting as on-site stormwater storage. The aggregate is strong enough… More
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 development and design of the Silva Cell system. In this column, which we’ll be running once a… More
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 development and design of the Silva Cell system. In this column, which we’ll be running once a… More
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 development and design of the Silva Cell system. In this column, which we’ll be running once a… More
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 development and design of the Silva Cell system. In this column, which we’ll be running once a… More
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 development and design of the Silva Cell system. In this column, which we’ll be running once a… More
This post is now out of date! Please see the updated post here. For the last two weeks of December I’ll be reprinting some of our favorite blog posts instead of putting up new ones. These will be on those evergreen topics that we can always revisit and apply to current projects. As this year… More
For the last two weeks of December I’ll be reprinting some of our favorite blog posts instead of putting up new ones. These will be on those evergreen topics that we can always revisit and apply to current projects. As this year winds down, hopefully some of these will be helpful as you plan for… More
While green roofs have been used for the past 30-40 years in Europe, the spread of green roof technology in North America is much more recent. Need for low impact stormwater management techniques is one of the biggest drivers for green roof technology in North America.
Soil. Stormwater. Sustainable Infrastructure.
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