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i-Tree Case Study

A Case Study in Using i-Tree on a Regional Scale

So you want to understand your urban forest better. Maybe it’s that you want to make the business case for its value, or understand where your tree canopy is strong and where it could still use work to help guide policy or budget decisions. In part 1 of this series, I gave a cursory overview... More

“Every city has a heart, and this is ours”
Mississauga Civic Square Silva Cell Case Study

Mississauga Civic Centre is a 37,280 square meter complex that houses the Mississauga City Hall, a towering monument of post-modern architecture designed by Edward Jones and Michael Kirkland that opened in 1987. Although it received numerous accolades, the surrounding campus and Civic Square suffered from mid-century design perspectives on public spaces, catering toward keeping people... More
Non-point source pollution_Runoff_of_soil_&_fertilizer

What’s the Point of Non-Point?

Question: What does “non-point source pollution” mean? Answer: What’s the point of non-point? The point is clear once we realize we’re talking about pollution. Non-point source pollutants are water contaminants that don’t come from a pipe, well, construction site, or any other well-defined, specific source. They come from a diffuse source of contamination originating in... More
The Most Important Factor for Growing Healthy Trees_Tim Scott

The Most Important Factor for Growing Healthy Trees

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 become obsessed... More
Recycled plastic, virgin plastic, and everything in between

Virgin Plastic, Recycled Plastic, and Everything In Between

In an era when there is a tremendous amount of focus on sustainability and renewable resources, it is hard to understand why any product might be made with virgin plastics. Today I want to write about recycling and re-use, and explain why for certain products  and applications virgin material can be the better choice. What... More
How wide do tree roots spread_Threthny

How Wide Do Tree Roots Spread?

“Most tree roots…occupy an area two to four times the diameter of the crown.” – Colorado State University Extension “Roots may occupy an area four to seven times the surface area occupied by the crown of the tree.” – Iowa State University Forestry Extension “While one rule of limb has been that a tree’s roots are one... More
top 10 ISA_Jeramey Jannene

Top 10 Takeaways: International Society of Arboriculture Conference

Last month we shared a “To 10 Takeaways” blog post about the Soil in the City conference earlier this summer. Today we’re sharing the Top 10s of another conference – the International Society of Arboriculture, held in Milwaukee, WI from August 2nd to August 6th – again compiled by L. Peter MacDonagh, FASLA. This list is a... More
UNC Bell Tower Trees

New Guideline Specifications for Nursery Tree Quality from the Urban Tree Foundation

Specifications and details are required elements of the design and construction process – they’re what ensure the proper components get built in the right place and to the right standards. Yet for trees, all too often the details and specifications don’t actually depict conditions that are optimal for growth. ANSI A300 established standard tree planting... More
What's the difference between urban soil and forest soil_Soil Science @ NC State

What’s the Difference Between Urban Soil and Forest Soil?

You don’t need much experience in arboriculture or landscape design to notice that planting trees in cities is very different from planting trees in forest environments. There are many reasons for this, but perhaps the biggest is the difference in composition of the soil. What do we mean when we say that urban soils are... More

Bioretention Tree Lawn is Free of Settlement
Silva Cell case study

Mosquito Creek Watershed in North Vancouver is a unique natural retreat nestled within a large urban footprint. The area is a popular retreat for hiking, mountain biking, and walking, and leads directly to the Trans Canada Trail, the longest hiking trail in the country. Due to its proximity to the City of North Vancouver, however,... More