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Cancellation Policy: Cancellations more than one week prior to a class are subject to a 15% cancellation fee. Cancellations with less than one weeks notice are non-refundable; please consider your payment a donation to the Gardens.


2020 7th Annual Tree Diversity Conference

To protect our urban forests, which are threatened by pests and pathogens, a greater variety of tree species is necessary.


For our seventh annual conference we will continue to explore the relationships between landscape design, horticultural practices and the use of a greater variety of tree species.


Between them, our speakers this year boast an extravagant depth of experience ranging from worldwide plant exploration to landscape and garden design, promotion of new plant materials, administration of some of our country's most noted horticultural conferences and institutions and hands-on experience with plant testing and data collection.


Public $80, includes all programming and lunch

$70 Promo, includes all programming and lunch

*Promotional price available to all Members of Colorado Tree Coalition and American Society of Landscape Architects



Symposium will be held at Denver Botanic Gardens in Mitchell Hall.


Speaker Lineup

Peter Zale, Associate Director of Conservation, Plant Breeding & Collections, Longwood Gardens, Kennett Square, PA


Stephen Foltz, Director of Horticulture, Cincinnati Zoo and Botanical Gardens, Cincinnati, OH


Keith Warren, Director of Product Development (retired), J. Frank Schmidt & Son, Co., Boring, OR


Panayoti Kelaidis, Senior Curator and Director of Outreach, Denver Botanic Gardens, Denver, CO


Alan Rollinger, Landscape Architect & Designer, Denver, CO

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