Stormwater permits are maturing in the greater D.C. region, driven by Chesapeake Bay and Anacostia River restoration mandates. Two of the three major Anacostia stormwater permits – for Montgomery County (issued in 2010) and the District of Columbia (issued in 2011), carry real clout in the form of retrofitting mandates with required numbers of impervious… More
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.
I like to periodically share information about recent Silva Cell installations, and today’s roundup is all Canadian projects – many for which we have before and after pictures. The soil volumes, applications, and age of these projects vary, so make sure to pay attention to the installation summaries for each. The above picture is from… More
In a recent webinar discussing the first principles of using trees and soil for stormwater management in urban areas, I mentioned that I am often not in favor of using mulch. In fact, I said that if it were up to me, mulch would not be included by default in most planting specifications. After the… More
“Bare root” is the form that most trees take when nurseries begin the several year process of growing trees for retail. The young trees must be handled carefully, are typically only available at certain times of year, and some species are sensitive to transplant as bare root stock. This has made it a bit tricky… More
We recently wrapped another video project! This one is about ArborTie, a staking and guying material from our legacy line. This video walks through the basics of the product and how to attach it securely to a tree.
A few weeks ago I attended the International Society of Arboriculture tradeshow and expo in Toronto. It was a fun show, with a number of excellent sessions and some great conversations. But the most fun part was getting a chance to go see some of our Silva Cell installations in the city, and the trees… More
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