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  • ASLA staff 7:42 pm on December 5, 2017 Permalink | Reply  

    Urban Street Tree Planting: Correcting Myths and Misconceptions 

    November Webinar_Jim Urban_Sugar Beach_Toronto

    ASLA 2012 Professional General Design Honor Award. Sugar Beach, Toronto, Ontario. Photo credit: James Urban

    Jim Urban’s recorded presentation “Urban Street Tree Planting: Correcting Myths and Misconceptions” is now available through ASLA’s Online Learning series. Hosted by the Planting Design Professional Practice Network, this presentation provides valuable information on best practice recommendations for urban street tree design.
    Despite 35 years of research, books, articles and lectures, the profession still maintains many myths and misconceptions about designing with trees in urban spaces. Tree health is still at risk from all too common and obsolete design errors. This webinar will point out the most common of these errors, and provide best practice recommendations to develop truly sustainable urban landscapes. Based on the six most critical concepts of designing for healthy trees, this session will teach sound, science based designs, details, and specifications. Better informed designers will have the tools to incorporate science and sustainability principles into the aesthetic principles that guide the design of these important landscape spaces.

    Learning objectives:
    • Understand best practices related to urban street tree planting.
    • Incorporate the six most critical principles to attain sustainability in urban tree design.
    • Use the latest research findings to make decisions on soil options for urban trees.

    James Urban, FASLA, ISA
    Urban Trees + Soils

  • asla staff 2:28 pm on July 5, 2016 Permalink | Reply  

    Tree and Soil Research Blog Site Launched! 

    Research supported design for soils and trees. Photo credit: James Urban

    Research supported design for soils and trees.
    Photo credit: James Urban

    For the past year, the Tree and Soil Research Subcommittee of ASLA, comprised of Jim Urban, FASLA, Chair, José Almiñana, FASLA, Eric Kramer, ASLA, and Peg Staeheli, FASLA,  has been working on ways to engage ASLA members in tree and soil research. This includes making the existing research more easily accessible to members, helping them to incorporate research into their own practice, and encouraging members to participate in new research efforts. To that end, the subcommittee, with the support of ASLA staff, is launching the Tree and Soil Research Blog to serve as a platform for discussions on tree and soil research. The site is intended to allow members to ask questions, post their own experiences related to research, develop community discussions and research-based best practices, and give researchers the opportunity to post their work for review and discussion.

    (More …)

    • Carl R. Kelemen, RLA, FASLA 1:39 pm on August 21, 2016 Permalink | Reply

      Like the site. I hope to see this grow and become even more valuable. I have learned several key things that will be incorporated into my specs and construction documents already.

      Keep up the good work.


    • Carl R. Kelemen, RLA, FASLA 1:53 pm on August 21, 2016 Permalink | Reply

      Thanks for setting this up. I hope it will provide much needed information and guidance for the profession. in reading the current posts, I have already picked up some pointers that I will incorporate into my specifications and construction documents.


    • daniel straub 8:19 pm on October 5, 2016 Permalink | Reply

      Excellent… with all of the new energy associated with higher-density mixed use development, complete streets, and green infrastructure, this blog will be a very valuable resource for many. Thank you.


    • Gordon Mann 4:51 pm on October 28, 2016 Permalink | Reply

      The challenges I have observed in landscape designs are:

      The project is not designed for the mature size of the tree, rather the tree at planting. Trees are dynamic and the site will change over time, the trees will get bigger.

      There are not long term maintenance plans included for the final spacing, irrigation changes, and periodic thinning, transplanting, or removing trees not in alignment with the final design and spacing.

      While adequate soil volume meets one challenge – design for mature trees, from the maintenance perspective is missing. It is hard to remove living trees and plants even when they were placed as temporary plants as the project grows and fills in. There has to be a plan in place as the site changes over time to “allow” the removal or transplanting of plants to reach the final spacing . If the design has a life period of say 20 years, that has to be noted and divulged.


    • Lan Hogue 12:44 pm on November 10, 2016 Permalink | Reply

      Thank you for starting this dialogue! Looking forward to participating and learning from these discussions.


    • Tobi Louise Kester 7:56 pm on February 7, 2017 Permalink | Reply

      I look forward to being a pat of this conversation! The soil component of green infrastructure is critical and as yet, not well defined in terms of what plants need…everything I’m currently dealing with is first and foremost designed to infiltrate quickly – which on it face is problematic for plants! I look forward to hearing about and discussing additives like biochar and biomass, along with research into how plants change soil over time.


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