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Recent Updates

TREE Fund is hiring...

We are seeking a full time Development Manager. Read the description and application procedure HERE.

March 2017 news from TREE Fund...

Read the latest edition of our monthly TREE Fund Bulletin.

Internships available at Holden Forest &...

Holden Forest & Gardens (The Holden Arboretum and Cleveland Botanical Garden) has multiple internship positions available:

Learn more at



A productive meeting of minds at Biomech...

It was a “who’s who” of tree researchers and practitioners that met at the Davey Tree Research Farm in northeast Ohio last summer for the third installation of Tree Biomechanics Week. This gathering, supported in part by TREE Fund, has been taking place once every three years as a way to cross-pollinate ideas and get researchers and practitioners working together to encourage them to take a broader view of their potential connections and contributions to tree care. Thank you to practicing arborist and aerial consultant Guy Meilleur for contributing this write-up about the 2016 event: Biology, Mechanics and Tree Care.

February 2017 news from TREE Fund...

Read the latest edition of our monthly TREE Fund Bulletin.





TREE Fund research published in 2016...

2016 was a great year for TREE Fund research. Not only did we award a record-breaking ~$550,000 in new grants, we also saw several TREE Fund-supported projects published and presented around the world, getting new knowledge into the heads and hands of the tree care professionals who care for our urban forest.

TREE Fund’s mission is to support scientific discovery and dissemination of new knowledge in the fields of arboriculture and urban forestry. As such, TREE Fund studies or research-related items appeared in every edition of our monthly newsletter, TREE Fund Bulletin, in 2016; you can find that information archived on our website. We conducted two free webinars featuring Dr. Ed Gilman on pruning and Dr. Bryant Scharenbroch on soil, and those reached roughly one thousand people across the globe. The webinars were so well-received that we’re expanding the program in 2017.

Results from TREE Fund studies were disseminated in peer-reviewed journals, industry publications and conference theses in 2016 – not to mention presentations. The published works are listed below. Read more about projects funded by TREE Fund and continue to keep up with the latest research results in the Grant Archive section of our website.

Ball, J.  2016.  How much does a tree weigh? Tree Care Industry 27(9): 12-15.

Chornobai V., Hrubskyy Y., Tistechok S.I., Fedorenko V., Gromyko O. Properties of actinobacteria from Potentilla depressa Willd. Ex SCH LTDL. rhizosphere and their biotechnological potential // XIII Conf. of Young Scientists “Scientific, applied and educational aspects of physiology, genetics, plant biotechnology and microorganisms”, Kyiv, May 19-20, 2016, P. 80-81.

Foard, M., D. J. Burnette, D. R. L. Burge, and T. D. Marsico.  2016.  Influence of river channelization and the invasive shrub, Ligustrum sinense, on oak (Quercus spp.) growth rates in bottomland hardwood forests.  Applied Vegetation Science 19(3): 401-412.

Garcia-Chance, L. M., M. A. Arnold, G. C. Denny, S. T. Carver and A. R. King (2016). Differential Environments Influence Initial Transplant Establishment among Tree Species Produced in Five Container Sizes. Arboriculture & Urban Forestry 42(3): 170-180.

Garcia, L.L., M.A. Arnold, L. Lombardini, R.T. Watson, S.T. Carver, and A.R. King.  2016. Is the old adage about small container-grown trees catching up to larger trees once they’re planted in the landscape true? In the Shade: Newsletter of the ISA Texas Chapter 40(3): 10-11.

Gilman, E., M. Paz and C. Harchick (2016). Effect of Container Type and Root Pruning on Growth and Anchorage after Planting Acer Rubrum L. Into Landscape Soil. Arboriculture & Urban Forestry 42(2): 73-83.

Grabosky J and Bassuk N.  2016 “Seventeen years’ growth of street trees in structural soil compared with a tree lawn in New York City.” Urban Forestry & Urban Greening  Vol. 16,103-109.

Harris, J. Roger, Day, Susan D. and Kane, Brian. 2016. Growth and stability of deep planted red maple and northern red oak trees and the efficacy of root collar excavations. Urban Forestry & Urban Greening 18:19-24.

Hauer, R.J. and W. Peterson. 2016. Building and Growing Professionals for Trees: Arboricultural Standards and Credentials. Arborist News 25(1):42 – 46.

Hauer R. J. and Peterson W. D. 2016. Municipal Tree Care and Management in the United States: A 2014 Urban & Community Forestry Census of Tree Activities. Special Publication 16-1, College of Natural Resources, University of Wisconsin – Stevens Point. 71 pp.

Hauer, R. and W. Peterson. 2016. Effects of Emerald Ash Borer on Municipal Forestry Budgets. Conference Proceedings of the International Society of Arboriculture 92nd Annual Conference & Trade Show. Fort Worth, TX. August 13 – 15, 2016.

Hauer R. and W. Peterson. 2016 Municipal Forestry Budgets and Employee Compensation. Arborist News. 25(5): 58 – 61.

Haugen, C., K. Tucker, A. Smalling, E. Bick, S. Hoover, G. Ehlen, T. Watson and S. Bernick (2016). The Efficacy of Paclobutrazol Soil Application as It Relates to the Timing of Utility Right-of-Way Pruning. Arboriculture & Urban Forestry 42(2): 95-101.

Johnson, G., R. Hauer, W. Peterson, D. Karcher, and J. Gulick. 2016. Financing the Urban Forest: Volunteers as a Source of Revenue and Program Support. Arborist News. 25(4):20 – 25.

Koeser, A. K., R. J. Hauer, A. Hillman, and  W. Peterson. 2016. Risk and Storm Management Operations in the United States –  How Does Your City Compare?. Arborist News. 25(2):20 – 23.

Koeser, A. K., R. J. Hauer, J.W. Miesbauer, and W. Peterson. 2016. Municipal Tree Risk Assessment in the United States: Findings from a Comprehensive Survey of Urban Forest Management. Arboricultural Journal. 38(4):

Peterson, W. and R. Hauer, and W. Peterson. Getting work done in the Urban Forest: Community Staffs, Volunteers, and Contractors. Arborist News. 25(6): 34 – 38.

Ries, P., R. Hauer, and W. Peterson. 2016 Systematic Management of the Urban Forest. Arborist News. 25(3):46–49.

Rigsby, C.M., D.A. Herms, P. Bonello, and D. Cipollini.  2016. Higher activities of defense-associated enzymes may contribute to greater resistance of Manchurian ash to emerald ash borer than a closely related and susceptible congener.  Journal of Chemical Ecology 42:782-792.

Vasylenko A., Hrubsky Y., Tistechok S., Fedorenko V., Gromyko O. Biotechnical Potential evaluation of actinobacteria from Phyllostachys viridi-Glaucescens (CARR.) A. Et C.RIVIERE rhizosphere from the protaction and promotion of plant growth // XII Inter. Scientific Conf. fron students and PhD Students “Youth and progress of biology”, Lviv, April 19-21, 2016. – P. 140-141.

Villari, C., D.A. Herms, J.G.A. Whitehill, D. Cipollini, and P. Bonello.  2016.  Progress and gaps in understanding mechanisms of ash tree resistance to emerald ash borer, a model for wood boring insects that kill angiosperm trees.  New Phytologist 209:63-79.

Register Now for STIHL Tour des Trees Si...

2017-STDT-Emblem-FinalCycling fundraiser for tree research marks 25 years planting seeds about the importance of trees

VIRGINIA BEACH, Va. — Ride the Silver Anniversary STIHL Tour des Trees, the nation’s leading fundraiser for tree research and education. The 500-mile journey will travel through Maryland, Virginia and our nation’s capital this summer and combines urban cycling, scenic trails and camaraderie to benefit tree research. The event is from July 30 – Aug. 5, 2017. Rider registration opens Feb. 6.

All funds raised by riders go to TREE Fund, which works to sustain the world’s urban forests by providing funding for scientific research, education programs and scholarships related to arboriculture and urban forestry. Throughout the week, riders will participate in tree plantings, educational programs and community engagement activities all geared towards raising awareness of the importance of the urban forest to our health and well-being.

“Year after year, we see a passion for cycling and the environment bring people from different professions and backgrounds together to promote the importance of tree research,” said Roger Phelps, corporate communications manager for STIHL Inc. “At STIHL, caring for nature is at the heart of who we are. As the title sponsor of the Tour, we are proud of the work TREE Fund continues to do to promote tree research and education in our communities. We look forward to an exciting milestone anniversary ride in our nation’s capital.”

STIHL Tour des Trees is the largest community engagement and fundraising event for TREE Fund. In 2016, the tour raised more than $400,000 for tree research and education programs aimed at connecting young people with the environment and career opportunities in green industries. Since 2002, TREE Fund has issued nearly $3 million in research grants for urban forestry and arboriculture researchers, as well as student scholarships and community education program grants. Ongoing research provides communities and tree care professionals proven strategies on how to better propagate, plant and care for trees, creating a more resilient and healthier urban canopy for generations to come.

The Tour also marks its 25th year with something new — looped routes staged from the International Society of Arboriculture (ISA) Annual International Conference and a 25th-anniversary party for Tour and conference participants on Aug. 1.

The 2017 STIHL Tour des Trees route consists of several loops throughout the Capital region and rolls out of National Harbor, Md.:
• Day 1: Jul. 30 – Prince George’s County, Md. Loop
• Day 2: Jul. 31 – Annapolis, Md. Loop
• Day 3: Aug. 1 – Washington, D.C. Loop (National Mall tour)
• Day 4: Aug. 2 – Leesburg, Va. Loop
• Day 5: Aug. 3 – National Harbor, Md. To Gainesville, Va. (overnight stay)
• Day 6: Aug. 4 – Gainesville, Va. to National Harbor, Md.
• Day 7: Aug. 5 – 25th Anniversary Slow Roll Community Ride Loop

Registration for the Tour is limited to 100 cyclists and closes on May 31 or when the roster reaches capacity. Riders are encouraged to register early to ensure a spot. Each full-Tour cyclist commits to raising $3,500 for TREE Fund. The $100 registration fee covers lodging and meals for the week, a custom apparel kit and full mechanical support. A partial Tour registration option with a prorated fundraising requirement is also available starting April 3.

Photos and videos from previous Tours are available at Learn more at

About TREE Fund
TREE Fund is a 501(c)3 charity dedicated to the discovery and international dissemination of new knowledge in urban forestry and arboriculture (the science of caring for trees in a landscape). TREE Fund manages a portfolio of scholarships and education grants to engage and support the next generation of tree stewards, and multiple research grants to improve the science, safety and practice of arboriculture.

With support from individual donors and Partners, TREE Fund research has contributed to:
• Improving conditions for tree growth in difficult sites
• Developing strategies to manage diseases and pests that affect urban trees
• Improving utility line clearing practices
• Understanding air pollution reduction and carbon sequestration by trees
• Determining the costs and benefits of urban trees

For more information, visit

About STIHL Inc.
STIHL Inc. manufactures the number one selling brand of gasoline-powered handheld outdoor power equipment in America,* as well as the number one selling brand of chain saws in the world. STIHL is also the number one selling brand of gasoline-powered handheld outdoor power equipment among U.S. landscape professionals.** STIHL products are sold through servicing power equipment retailers from coast to coast – not big box stores. Located in Virginia Beach, Va., STIHL Inc., the headquarters for U.S. operations for the worldwide STIHL Group, exports to over 90 countries around the world; and the majority of STIHL products sold in America are also built in America.* STIHL products sold through U.S. STIHL dealers are for distribution in the United States only. For more information or for the name of a local STIHL retailer, call toll free 1-800-GO STIHL (1-800-467-8445), visit or text your zip code to 78445.

*A majority of STIHL gasoline-powered units are built in the United States from domestic and foreign parts and components. “Number one selling brand” is based on syndicated Irwin Broh Research as well as independent consumer research of 2009-2016 U.S. sales and market share data for the gasoline-powered handheld outdoor power equipment category combined sales to consumers and commercial landscapers. **“Number one selling” claim based on 2007-2016 syndicated Irwin Broh Research of the U.S. professional landscaper market.

STIHL is pleased to support the work of Independent We Stand, the Tree Research and Education Endowment Fund (TREE Fund), International Society of Arboriculture (ISA), the Tree Care Industry Association (TCIA), National FFA, National Association of Landscape Professionals, the National Recreation and Parks Association, the National Association of State Park Directors and the North American Retail Hardware Association.

For information on job opportunities with STIHL Inc., please go to STIHL is an EEO and drug-free work environment.
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Ken Ottman Outstanding Volunteer Award...

Nominations for the Ken Ottman Outstanding Volunteer Award are being accepted February 15 to April 1, 2017. This award honors a TREE Fund volunteer who has gone above and beyond in support of TREE Fund’s mission. To nominate an individual, please provide the following information:

  1. Your name
  2. Name of the person you are nominating
  3. Note how the nominee supports the mission of TREE Fund (50-250 words)
  4. Which TREE Fund activities did the nominee participate in or support: Board of Trustees, TREE Fund Committees, Special Events, Fundraising
  5. Provide a brief quote describing why this nominee should receive the Ken Ottman Award (100 words max.) (May be used in TREE Fund publications).

Submit your nomination to Barb Duke at by April 1.

January 2017 news from TREE Fund...

Read the latest edition of our monthly TREE Fund Bulletin.

Leading Thoughts...

Eric Smith 1 squareby J. Eric Smith, TREE Fund President and CEO

When I sat down to write a year-end note for the TREE Fund Bulletin (our newsletter) in December 2015, I was still a relative newcomer to TREE Fund and the professional community we serve. To improve both my personal knowledge of our field and TREE Fund’s organizational capabilities, I set goals to meet, listen and learn from as many of you as I could, and to manage TREE Fund’s fundraising, “friendraising” and grant-making activities as efficiently and effectively as possible. So as we now prepare to close the books on 2016, I wanted to provide you with some summaries on how we did against those goals from a year ago.

On a personal note, I visited 26 states in 2016, and was awed by the hospitality I received, by the commitment of so many volunteers in so many communities, and by the extraordinary learning opportunities I was afforded via conferences, presentations, and one-on-one visits with so many of you. Organizationally, while we’re still working to finalize contracts and secure year-end pledges, it looks like 2016 will be a record-setting year for us in terms of the value of new grants awarded, even as we increased our endowment fund by about 20% – from just under $3.0 million to roughly $3.7 million.

Our STIHL Tour des Trees riders also set a fundraising record: when all the final pledges are paid, we should be just a hair over $400,000 raised, all of which will go out in 2016 or 2017 in grant awards, or be added to endowment when designated by donors. Our new TREE Fund After Hours was a success both in terms of net proceeds and attendance, and we were proud to work with the Utility Arborist Association and Pacific Gas & Electric Company to achieve the first year of the PG&E Challenge, putting us on track to meet the $1.0 million goal for the Utility Arborist Research Fund in 2017.

None of this would have been possible without the generosity of too many individuals and corporate partners to name here, but if you supported us in 2016, then these successes are yours just as much as they are ours. Our year-end appeal notes that “growth rings in the new year,” and we confidently aim to build on 2016’s accomplishments from the very start of 2017, in what we think will be a truly transformative year for TREE Fund. So watch this space . . . exciting times are ahead, thanks to you!

Don't delay!

Nominate an outstanding TREE Fund volunteer for the Ken Ottman Award before the April 1 deadline!

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