Monday, January 27, 2014



Tree diversity conference    2014

Scott Skogerboe and Acer tataricum in fall color

Our urban forests are under siege from disease, aging canopy,
budget constraints 
and more.
Leading experts on creating a
vibrant urban canopy from across America will launch this first event of its kind in Colorado.

Lindsay Auditorium, Room 281

Sturm Hall, University of Denver

Map and directions to the Lindsay Auditorium and

Parking options on campus will be provided to all registrants.

For Additional Information contact Sonia John at

Friday, March 7, 2014  9:00AM to 4:30PM 

Attendance $60 per person. $35 for registered students. Includes Panera box lunch. Prompt payments made by credit or debit card by logging on to and clicking on the “Send Someone Money” button. Specify that the payment be made to in the field “Their Email.” Please include the names of all the people you are registering in the comments box on the PayPal form . The charge will show up on your credit card statement as 2014treediversityconference.” Refunds of fees will not be available after 2/28.

Contact Sonia John ( for details.
A map and directions to the Lindsey Auditorium on the University of Denver campus will be sent to all registrants and will provide information about parking and public transit options.

Continuing Education Credits: Attendance at this event will confer continuing education credits for arborists. Certification has been arranged with the International Society of Arboriculture (ISA).

The University of Denver Chester M Alter Arboretum &

Denver Botanic Gardens

Committee: Rob Davis, Denver City Forester; Sonia John;

  Panayoti Kelaidis, Denver Botanic Gardens; Martin Quigley, D.U.


“Trees For Hot Dry Places”

Steve Bieberich owns Sunshine Nursery in Clinton, Oklahoma. He’s developed numerous trees that thrive in the dry climate and alkaline soils of western Oklahoma. He has collected in Asia and across America,  grown and evaluated in his nursery-arboretum. He was the first to introduce the thornless male Osage orange cultivar ‘Whiteshield.’ He’s a world authority on cultivated Ulmaceae.

High Plains
Tree Selection & Propagation”
Scott Skogerboe is the head propagator at Ft. Collins Wholesale Nursery, growing over 300,000 plants a year. Scott, a Ft. Collins native and CSU graduate in landscape horticulture, has spent decades in exploring, selecting and propagating trees and shrubs that are adaptable to climate and soil conditions in communities stretching from Casper, WY to Albuquerque, NM.

“Tough Trees for Urban Landscapes”

Guy Sternberg owns Starhill Forest Arboretum in Petersburg, Illinois. Guy retired after a long career with the Illinois Dept. of Natural Resources and is a life member of the International Society of Arboriculture as well as a landscape architect. He was also a founding member of the International Oak Society. He has written two books on native American trees (Timber Press), and has introduced many new tree cultivars.

“Citizen Activism to Revitalize an
Urban Tree Canopy”
Mike Hayman lives in Seneca Gardens, Kentucky. He was a professional newspaper photographer who undertook a major tree planting and diversification program near Louisville after a freak windstorm devastated a mature but non-diverse tree canopy twenty years ago. His efforts, now codified in city policy, were among the first to mobilize major citizen support of species diversity and Seneca Gardens is now viewed as a mini-arboretum.


  1. Is there a telephone contact ? PayPal doesn't work for me and my email hasn't been answered
    Seems like a great conf and it's great that it will be held at DU

  2. Sonia has gotten a lot of emails--you should have gotten an answer by now! I will get an address where you can send a check if you still haven't heard when you read this.


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