We recently learned that Tigard, OR, a town of about 48,000 people that is part of the Portland metro area, has implemented an impressive soil volume minimum for trees planted in streets and parking lots: up to 1,000 cubic feet of soil per tree.
This article is the first of a series that aims to plant innovative, inspiring, and actionable seeds in the realms of community-building, art, and arboriculture. These seeds will be planted by providing readers with information on funding programs and opportunities for environmental projects alongside discussion of related concepts/projects in contemporary art. What will grow exactly… More
In July, this blog posted about the disagreement among citizens in Portland, OR over proposed changes to their urban tree ordinances. At its heart, the conflict in Portland seems to center on whether the city government should have jurisdiction over privately owned trees. The majority of the commenters on the article felt that the city’s… More
An exciting thing happened on July 23rd in Montgomery County, MD: Bill 35-12, which requires builders to replace trees that are cut down or disturbed during development as well as planting new trees on sites where they may never have existed in the first place, was unanimously passed.
Welcome to the club, Durham! The minimum-soil-volumes-for-street-trees club, that is. Durham’s recently released landscape manual now includes the following soil volume requirements for street trees:
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 me it seemed like something important was missing from the judging criteria.
This post is now out of date!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
In part 1 of this series, I summarized some of the lessons we learned from those people on the forefront of setting minimum soil volume policies. In today’s article, I will summarize how actual adopted soil volume policies compare to the minimum soil volumes trees need according to research studies.
Trees need an adequate volume of rootable, oxygen-rich soil to thrive, and minimum soil volume policies are a powerful tool for arborists and other advocates to leverage better growing conditions for trees, especially in urban areas. In preparation for Peter MacDonagh’s presentation at the 2012 ISA conference in Portland, OR, “Leveraging Healthy Urban Forests with… More
In 2011, CMG Landscape Architecture was approached by a tech company to design the courtyard of their new headquarters in Menlo Park, CA. The project was on a very fast track. In addition to the accelerated timeline, CMG’s proposed design for the site had the total impervious surface area increasing from 40 percent to 60… More
We like to keep track of cities that are doing more for trees, specifically by implementing minimum soil volumes for urban planting. I’m happy to share that we are adding the city of Oakville, ON to the list, where they have recently implemented a requirement that street trees be planted in 30 m3 (1,059 ft3) of soil… More
In February, the U.S. Forest Service published a report indicating that cities around the country are losing around 4 million trees per year. Of the 20 cities included in the study, 17 showed significant losses of canopy cover, and 16 showed significant increases in impervious hardscape (or paved surfaces that don’t absorb water). At the same time,… More
Soil. Stormwater. Sustainable Infrastructure.
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