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Purdue Commercial Nursery & Landscape Program

Horticulture & Landscape Architecture > Extension > Commerical Nursery and Landscape Program

The Purdue University Commercial Nursery and Landscape program strives to make the industry in Indiana, the Midwest, and the United States more profitable, sustainable, effective and efficient, while increasing the quality of life for the owners, employees, and the general public through education, research, and outreach programs. The Department of Horticulture and Landscape Architecture, with the assistance of Purdue University Extension, aides in facilitating these endeavors. Being a leading land grant institution, extension and outreach programs are designed to facilitate the advancement of agricultural industries, including the Nursery and Landscape Industry. We will commit to the industry to develop and maintain effective educational programming and research that will be relevant and productive for the industry’s needs. We always welcome feedback to become a more efficient resource for the Nursery and Landscape Industry.


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​Mark your calendar for the 2015 Purdue Turf and Landscape Field Day on July 14, 2015!  We will have turf, landscape, and, new for 2015, a Spanish speaking tract!  Registration opens in mid-May.


invasive alternative bulletin picture.jpgClick here for our Facebook site, giving you the latest news and stories relating to the Nursery and Landscape Industry in Indiana and the Mid-West.

Educational Opportunities:

The Indiana Green Expo (IGE) is Indiana's most comprehensive green industry educational conference and trade show. It is a time of education, new products and networking with industry members. The IGE features exhibiting companies from around the country. Our attendees are from Indiana and the surrounding states which include business owners, managers and staff of wholesale and retail nurseries, landscape management firms, greenhouse growers, golf course superintendents and staff, grounds maintenance departments, landscape design and installation firms, garden centers, consulting firms, educational institutions, suppliers and more! Go to for more information.


For questions, please contact Kyle Daniel at 765.494.7621.



New Resources Available for Emerald Ash Borer and Pollinator Safety

Cliff Sadof, Department of Entomology, Purdue University

We are happy to announce two new tools give the latest information about two hot topics: emerald ash borer and pollinator safety.
Emerald Ash Borer Self Study Course
Self study courses for the Green Industry and Master Gardeners are now available at the following on our website. 
Each course uses 100 slides to guide the student through the history, biology and management of emerald ash borer.  We review the latest tools, for diagnosing EAB and assessing tree health.  We also provide clear suggestions on how to come to an effective management decisions.  These both draw heavily on insecticide recommendations that were revised in June 2014 (  to include how to effectively apply imidacloprid, dinotefuran, azadirachtin and emamectin benzoate. 
Students who can pass a 50 question quiz can print a certificate to demonstrate that they have received special training about EAB.


New Neonicotinoid Pollinator Website available for the Green Industry.
Doug Richmond and I have developed a mobile friendly website to help you answer questions you may have about how the use of neonicotinoid insecticides, like imidacloprid, dinotefuran, acetamiprid can affect pollinators. ​ We provides specific fact sheets to  help you safely protect plants from pest, while minimizing harm to pollinating insects. We also provide links to other resources to provide a science based background about the controversy. 


Indiana Nurseries: Time is running out to have your voices heard!

Kyle Daniel, Commercial Nursery and Landscape Outreach Specialist
Department of Horticulture and Landscape Architecture, Purdue University.

More than likely you have witnessed the increased awareness about invasive species, particularly invasive plants, over the past few years.  Fairly or unfairly, the Green Industry is often on the defensive in the discussions about invasive plants.  The modes of introduction are many, including through the ornamental trade.  It is very important for your operation to be well versed in the terminology surrounding invasive plants.  There are many terms associated with invasive species, including alien, non-native, introduced, and exotic, relative to invasiveness.  All of these terms are synonymous in relation to invasive species.  Not all introduced species are invasive and not all natives are non-invasive. 

The Indiana Nursery and Landscape Industry should be aware of coming legislation to invasive plant species within the state.  Plants that will have significant impact to the industry are to include, Pyrus calleryana (callery pear), Acer platanoides (Norway maple), and Euonymus fortunei (wintercreeper).  With Phil Marshall and Megan Abraham of the Indiana Department of Natural Resources leading, we are conducting a cost analysis to Indiana nurseries in order to determine the economic impacts in prohibiting the sale and movement of specific species.  We have sent a survey to all nurseries throughout the state and the IDNR has approached the largest nurseries (>25 acres) to gather data.  At the Indiana Green Expo on January 22nd, there was a listening session that allowed for feedback to the committee (Fig.1).  Though this session was helpful in moving forward, we need as many nurseries to contact us as soon as possible with feedback and economic impacts of their operation so that the ‘whole picture’ can be gathered. 

There are viable alternative species that can be used in place of the three plants listed above.  The Purdue Green Industry Working Group, with the assistance of the Indiana Nursery and Landscape Association, business owners, IDNR, and The Nature Conservancy, is currently working on a list that is viable for nurseries, landscapers, and homeowners.   We must remember that education for the end-consumer is key to this venture.  Educating your customers can assist to minimize the detrimental effects to your bottom line. 

Remember to contact Kyle Daniel at as soon as possible with feedback so that we can send to the committee charged in making this process as smooth as possible for your nursery and/or landscape company. 

You may read the current DRAFT of the invasive species legislation by clicking HERE .


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White fringetree (Chionanthus virginicus) has been found attacked by emerald ash borer (Agrilus planipennis Fairmaire) by Don Cipollini, a professor at Wright State University in Ohio
• A larval specimen and a partial adult specimen extracted from this tree have been positively identified as EAB.
• To date Dr. Cipollini has found 4 trees at 4 sites with suspected EAB.  These specimens have all been collected in areas where the abundance of dead ash trees suggest that local populations of EAB were high.
• Widespread attack of white fringe trees have not been reported.
• These findings indicate the need for additional studies to determine the full extent to which EAB is able to complete its lifecycle and utilize white fringetree as a host.
• EAB has not been found in the Chinese fringe tree C. retusus.
What is a fringe tree and why is it important?

• The white fringe tree is a native species that is found in the Southeastern US from New Jersey to Louisiana.  The northern part of the range glances through Southern OH and KY.
• C. virginicus (white fringe tree), and its congener C. retusus (Chinese fringe tree) are used in many landscapes.
• The capacity of EAB to move to the fringe tree could indicate a capacity to move to other plant members of the Olive family, including lilac, and privet.  Previous research conducted in the 2000’s that tested these species found EAB to be unable to complete its lifecycle on these hosts.  To date, despite the loss of over 50 million ash trees in areas where lilac, privet and fringe trees are grown, no other observations of potential host shifting have been reported. 
Regulatory Implications:

• The APHIS EAB Cross Functional Working Group will be discussing this issue to determine implications of this new information to the regulatory and detection aspects of the EAB program.
• At this time, EAB regulatory operations and policy remain unchanged.  Management Implications.
What needs to be done?

• Plantings of fringe trees should be inspected for dying branches and epicormic shoots.  Trunks of these trees should be inspected for D shaped exit holes. 
• Incidences should be reported to your nursery inspector (, or email, or call 1-866 NO EXOTIC (1-866-663-9684).

• Nurseries and plantings in areas near or where EAB populations are high may be treated with a trunk insecticide like permethrin to kill beetles attempting to lay eggs on the trunk.  Otherwise a soil application of dinotefuran can be made AFTER trees have finished flowering.  Fringe trees finish flowering by June 1 in most of Indiana.

Opinions expressed on this site may not represent the official views of Purdue University.