Last year, The Kestrel Design Group developed a formula for the Minnesota Pollution Control Agency to estimate evapotranspiration benefits from trees to include in their stormwater crediting system. This formula is one of the first – or possibly the first – in the country to formally quantify this benefit. I spoke to Nathalie Shanstrom, a landscape architect… More
The World Forestry Center is a nonprofit educational institution that was founded in Portland, Oregon in 1964. Their mission is to educate and inform people about the world’s forests, trees, and environmental sustainability and to increase public awareness of the benefits of sustainable forestry management – environmental, social and economic. Rick Zenn is the Senior… More
This article tells the story in words and pictures about the evolution of a sidewalk on a single block in San Francisco. The 20th Street Biophilic Landscape is on 20th Street between Alabama and Florida Streets. This block is a flat area that was on the edge of or part of a tidal marsh. In… More
Downtown Fort Worth, Texas was a popular hangout for outlaws, cattleman, gamblers, cowboys, and many legendary names from the glory days of the Old West. The site’s historic architecture and rich heritage has been preserved through the development of Sundance Square, a 35-block collection of restored and replicated turn-of-the-century storefronts, outfitted with colorful landscaping and… More
Trees and Design Action Group (TDAG) is an not-for profit, open collaborative facilitating cross-sector and cross-disciplinary dialogue and projects promoting the role of the urban forest throughout the United Kingdom. I am the convenor of the group. We share the collective vision that the location of trees, and all the benefits they bring, can be… More
One of the most misunderstood Silva Cell standards is the 18” (45 cm) setback from roadway traffic. It’s true that when Silva Cells are installed adjacent to a roadway, we require 18” (45 cm) of horizontal separation between the Silva Cells and the path of the nearest tire. There are two reasons for this requirement…. More
This is Part 3 in the History of Street Trees – British Isles series. You can read Part 1 here and Part 2 here. The lack of costly infrastructure as defensive walls, previously discussed at the beginning of part two of this series, allowed British cities to expand piecemeal into the countryside, with lower population densities…. More
This is Part 2 in the History of Street Trees in Britain and Ireland. Read Part 1 of this series here. The cultural, religious, medical and agricultural vacuum that followed the collapse of the Holy Roman Empire led directly to the establishment of independent, self-sufficient catholic monasteries. The dominant monastic culture came directly from Britain, specifically… More
Last year, Jim Urban wrote a post for this blog entitled Against Mulch. The principle reasons he cited for his position were: 1) Mulch floats and can clog drains and releases “lots of phosphorus” as it breaks down, and 2) work by Gilman et al. that suggest that mulch does not reduce evapo-transpiration. We discussed… More
In 2012 Dŵr Cymru (Welsh Water) committed a £15 million investment in Llanelli and Gowerton to help alleviate the risk of flooding in the area through the adoption of retrofit SUDS, or sustainable Urban Drainage Systems, that utilize greenspace and trees to prevent flooding by allowing rain to soak into the ground or slowly re-enter… More
My blog, The Garden Professors, has an ongoing and lively discussion about invasive plants. Let me state up front that none of the Garden Professors is promoting invasive plants. But the issues surrounding invasive plants are extremely complex and have profound implications for many groups with whom we work in landscape horticulture and urban and… More
Despite modest amounts of annual precipitation, Ireland and Britain are among some of the most perfect places to grow trees. The high latitudes and moderating Gulf Stream of the Atlantic Ocean has insured an exceptionally temperate environment is ideal for most trees, even sub-tropical ones such as palm trees. Never too hot, never too cold,… More
Soil. Stormwater. Sustainable Infrastructure.
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