University of Kentucky HortMemo

HortMemo - A University of Kentucky Cooperative Extension Service Newsletter for the Kentucky Nursery/Landscape Industry
Current 2012 HortMemo below

by Winston C. Dunwell, Professor - Nursery Crops Development Center

UK Department of Horticulture

To subscribe send an e-mail to cforsyth@uky.edu or call Christi, 270.365.7541 x 221.

HortMemo 2013


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2013HortMemo Archive


December 3, 2013



Increasing Efficiency in Pest Management a workshop for nursery and landscape professionals will be December 4, 2013 at Hardin County Extension Office, Elizabethtown, KY.  Contact: Sarah Vanek, 859.257.1273; e-mail, sarah.vanek@uky.edu ; url, http://www2.ca.uky.edu/HLA/Dunwell/IncrEfficiencyPestMgt_131204.pdf


I read on the Hoffman Nursery Site that “Panicum virgatum ‘Northwind’ is the 2014 Plant of the Year awarded by the Perennial Plant Association.  Roy Diblik of Northwind Perennial Farm introduced Panicum virgatum ‘Northwind’ in the early 1990s. It came from seed he collected in 1982 near railroad tracks off of Highway 25 in South Elgin, Illinois. As the seedlings grew, Roy noticed one unusual plant growing upright, rather than arching, with beautiful blue-green leaves.”  See more at: http://hoffmannursery.com/panicum-northwind-plant-of-the-year/#sthash.WyZM4c18.dpu


I had the good fortune to attend the American Holly Society meeting and be an invited speaker.  I do not normally get nervous but when I went to breakfast and found Jules and Bessie Klein, Earl Cully and Aaron, Elwin and Porsche Orton, Mike Hayman, John Swintoski, Scott Buerlin, Kevin Collard, and bunches more of those I hold in very high regard I rushed back to my room and modified my talk to include as many as possible and after being weak kneed to start I got over it and had a wonderful time talking about hollies and my friends in the room.


Martin Stone, Western Kentucky University Professor and Peggy Mckillip, WKU Horticulture Researcher at the Baker Arboretum were on a Kentucky Garden Club Landscape Course program with me.  There I learned that the Downing Museum burned in July with the paintings on display damaged, one painting burned and a tapestry lost to the fire. Thankfully, Martin, students and volunteers removed the art work in storage in the basement from the building undamaged.  Special art restorers are on site working on the damaged art and the section of the museum damaged is being replaced.  While in Bowling Green I visited Mitchel Leichhardt and found him well and that he had installed some new landscape plantings of boxwood (mini-hedge edging), crapemyrtles and perennials.

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August 13, 2013

Carey Grable, University of Kentucky Extension Associate for Nursery Crops, and Matthew Chadwick, Director of the Murray State University Arboretum, are hosting a Nursery Crops Field Day and Arboretum Tour, August 29th at 5:00 pm CDT. Carey will discuss research with the RootPouch® plantable container and Matt will provide a tour of the arboretum. The Arboretum at Murray State University is located at the end of Hickory Drive just off of Main Street going west.  See you there! 
Event Flyer http://www2.ca.uky.edu/HLA/Dunwell/2013AugustNurseryFieldDayAboretumTourFlyer_WKNursery.pdf
Murray State Arboretum

The Louisville Nursery Association meeting is Wednesday, August 21, 2013 starting at 5:30 pm EDT. LNA will be at Denzil Ashley’s Lawn & Landscape, 8900 LaGrange Rd., Louisville, KY 40242.  A SPECIAL RESEARCH PROJECT TO BE CONDUCTED DURING SOCIAL HOUR:  The University of Kentucky Horticulture Department along with their colleagues from Agriculture Economics have been conducting research with plantable containers for a couple of years.  They would like to test these products with professionals in the industry and have asked if our members would be willing to participate in a survey to help them determine the acceptability of various containers for ground cover production & sales. They will display flats of plants & participants will be asked to answer questions about the value of various attributes of the product.  It will take about 5 minutes to complete the survey.  Following dinner Mike Hayman, Arborist for the City of Seneca Gardens, the Landscape Director for Whitehall House & Gardens & Co-Chair of the Tree Projects Committee of the Louisville Metro Tree Advisory Commission, will discuss the - tree canopy issue in Louisville; the problem & the response from the city. Sounds like an interesting meeting – See you there!

The Kentucky Nursery and Landscape Association (KNLA) 14th Annual Summer Outing is September 5, 2013 at Yew Dell Botanical Gardens, 6220 Old LaGrange Road, Crestwood, KY 40014. Presenters include: Dr. Gregg Munshaw, Univ. of Kentucky, Maintaining a Healthy Residential Turf; Bill Hendricks, Klyn Nurseries, “Sustainable Plants for Landscape Success”; Robert Rollins, Greenhaven Tree Care,  “Sharp Advice for the Green Industry”, and Dr. Paul Vincelli, University of Kentucky, “Climate Disruption: Good News (and Challenges) in Horticulture”. There will be tours of Yew Dell, lunch and exhibitors. For the program go to http://www.knla.org/files/SummerOuting Brochure FINAL.pdf Register with the form at http://www.knla.org/files/2013 Summer Outing Attendee Registration Form.pdf For more information contact Betsie A. Taylor, KNLA Exec. Dir., P.O. Box 6827, Frankfort, KY 40602-6827; 502.320.3733; e-mail, mail.knla@gmail.com ; url, http://www.knla.org

The Southern Nursery Association Researcher’s Conference, Southern Plant Conference and SNA Trade Show were a success in my book.  Southern Plant Conference planner Don Shadow told me there he was planning a plant conference for next year.  This year was limited to 200 but there was not even standing room.  There were people in the doorways and outside the room including presenter Tony, and his wife Anita, Avent; they had married 2 days earlier.  While the room will be larger next year better plan to register early.

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June 3, 2013



Sustainable Beauty: Landscape Plants That Thrive in the Southeast symposium. June 6, 2013, 8:30 a.m.-4:00 p.m. Mountain Horticultural Crops Research and Extension Center, 455 Research Drive, Mills River, NC 28759. I am speaking at that event on Kentucky Natives. Some of my favorite colleagues are on the program: Donna Fare - Yellow flowering magnolias; Jim Robbins and Jon Lindstrom - Evaluation Program: Don't try this at home; Gene Blythe - All-America Selections: Top Performers for Southeastern Gardens; Allen Owings - Louisiana Super Plants for Yankees to consider. Alex X. Niemera - Something to Bark About; Mike Arnold - Developing Coastal Natives for Xeric and Saline Landscapes; Gary Knox - Taking the Tropics to the Mountains: Florida Plants for Halfbacks and Other North Carolina Gardeners; John Ruter - Conifers for the Southeast. Contact: Anthony Lebude, 828-684-3562 (ext. 135); Anthony_LeBude@ncsu.edu program flyer url, http://www.ca.uky.edu/HLA/Dunwell/SustainableBeautyLandscapePlantsThatThriveintheSoeast.pdf; register online http://go.ncsu.edu/sustainablebeauty

Lean Makes Green: A workshop for nursery and related professionals on June 14, 2013. It will be at Valley Hill Nurseries, 237 Jones Lane, Springfield, KY. Lean has proven to be a powerful tool to reduce costs and make empower managers and staff and increasing job satisfaction at the same time. For more information contact: Sarah Vanek, 859.257.1273; e-mail, sarah.vanek@uky.edu ; url, http://www.ca.uky.edu/HLA/Dunwell/UKLeanProgram_SpringValley_130614.pdf


UKREC Horticulture Field Day: Ornamentals and Fruit Program. The Ornamentals Tour includes the newly established trial gardens and ornamentals research and the fruit research orchard with Dewayne Ingram, Sarah Vanek, Carey Grable and Win Dunwell presenting and on site for questions. On the Orchard Tour Drs. Nicole Ward and Ricardo Bessin will present information on controlling fruit disease and insect problems in the orchard and vineyard.  Dr. John Strang will discuss tree and small fruit varieties, and Patricia Wilson will talk about vineyard management. It will be at the UKREC, 1205 Hopkinsville Street, Princeton, KY 42445. June 27, 2013, 9:00 start at the Center Building. Contact Winston Dunwell, 270.365.7541 x 209, wdunwell@uky.edu. url,.http://www2.ca.uky.edu/HLA/Dunwell/UKRECHort2013OpenHouse.pdf

Kelly Ivors of North Carolina State University says “Knowing what box[wood] blight symptoms look like will help growers/landscapers/home gardeners learn how to scout for the disease. I uploaded some photo albums at the link below: http://go.ncsu.edu/boxwood_blight_links Once at the URL---, you have to right click the photo album link and open it up in a new window or Tab.”

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January 18, 2013



The Kentucky Landscape Industries Winter Educational Conference January 23-25, 2013 and the KLI Expo/Trade Show January 24-25, 2013 will be at the Kentucky International Convention Center in Louisville.  See you there! I have seen the KLI program and the KLI Expo Show Guide and there will be Great Speakers and lots of Exhibitors! Full Registrants can earn 9 General & 5 Specific Pesticide CEUs, 10 Arborists’ CEUs and 4 KY Landscape Architecture Board CEUs. For more info http://www.knla.org The UK Nursery Crops Group will be in booth 702, SEE YOU THERE!!!!


Want to win an ipad?   Complete this sensor-based irrigation networks survey! Researchers from around the country are trying to determine how sensor-based irrigation networks can benefit the ornamental plant production industry. We would like your help to better understand current practices.  To do this, we have developed a short survey. 

This survey should take 5-10 minutes to complete.  Your participation is the key to the success of this project.  Access the survey by clicking the link below (or typing the address into your internet browser): https://www.research.net/s/ornamental


***All completed surveys will be entered for a chance to win one (1) Apple ipad!***


The information we gather will help create baseline information, and to determine the potential of the sensor systems to improve specific greenhouse, container nursery, and field nursery practices.  It will also help us measure the impacts of changing practices over time and help define research goals at the local, regional, and national levels, to help growers address current and future needs.


All information you provide will be kept STRICTLY CONFIDENTIAL, and only summary information about the industry and aggregated estimates of economic and environmental impacts will be presented. Your individual responses will not be shared with any state or federal regulatory agency, and will be protected as required by Federal law, as part of the University of Maryland human subjects agreement that you will be asked to agree to before you begin the survey.


Any questions or comments can be directed to John Majsztrik: jcmajsz@umd.edu


A forum entitled Climate Change: Values, National Security, and Free Enterprise has been organized by Dr. Paul Vincelli, Professor and Provost's Distinguished Service Professor. He has gathered an exciting and unique lineup of highly respected individuals to provide thoughtful and enlightening presentation on climate change. The forum is to be held on the evening of April 4th on the campus of the University of Kentucky.  The event will be live-streamed.  Please see the following URL for details:http://www2.ca.uky.edu/environment-files/ccflyervincelli.pdf

The Forum is part of the April 2-4, 2013 Environmental Conference: http://www2.ca.uky.edu/environment/enviro_event_2013


Several great papers where in the December 2012 Journal of Environmental Horticulture. Well they are all great papers but one’s I found particularly interesting were:

Ed Gilman and Michael Orfanedes’ Root Pruning and Planting Depth Impact Root Morphology in Containers (J. Environ. Hort. 30:173-181).  As you can tell from the title root pruning and planting depth do influence root morphology with root pruning resulting in higher quality root systems on live oak and two tropical plants.  The authors state in their abstract “Increasingly, producers and consumers are realizing that roots play a major role in nursery tree quality. To remain competitive, producers need to find economically viable methods of increasing quality standards.”
Gary Know, Bill Klingeman, Mathews Paret and Amy Fulcher’s Management of Pests, Plants Diseases and Abiotic Disorders of Magnolia Species in the Southeastern United States (J. Environ. Hort. 30:228-234) is an outstanding overview of Magnolia production pest management.  Dr. Gary Knox of UFL at Quincy is a magnolia expert and if in your winter travels to warmer climes you are near Quincy, FL west of Tallahassee you should visit his evaluation plots filled with numerous species and cultivars of magnolia.  If you do not have access to the Journal of Environmental Horticulture you can read the information in the IPM for Select Deciduous Trees in Southeastern US Nursery Production book linked from The Southern Nursery Integrated Pest Management (SNIPM) working group page at http://wiki.bugwood.org/SNIPM

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January 9, 2013



Sarah Vanek, Extension Associate for Nursery Crops - UK Campus, organized the excellent standing-room-only Integrated Pest Management and Best Practices Workshop on December 11, 2012 at the Scott County Extension Office. To all who attended if you want to see the presentations again or you missed the event Carey Grable, Extension Associate for Nursery Crops - UKREC, is preparing the presentations as YouTube videos. If you subscribe to the UKREC Horticulture Channel http://www.youtube.com/user/UKRECHort you will receive notification when new videos are added. Carey is also working on pruning and propagation by division videos.

We will see you at the Upcoming Meetings:

Kentucky Landscape Industries (KLI) Winter Conference. January 23-25, 2013. Louisville, KY. Sponsored by Kentucky Nursery and Landscape Association, Kentucky Arborists' Association, Kentuckiana Greenhouse Association, and the University of Kentucky Cooperative Extension Service. Contact: Betsie A. Taylor, KNLA Exec. Dir., 216 Pendleton Lane, Frankfort, Ky. 40601, Frankfort, KY 40601; 502.695.0106; Fax, 502.695.8455; e-mail, mail.knla@gmail.com; url, http://www.knla.org/

Kentucky Nursery and Landscape Association (KNLA) Trade Show. January 24-25, 2013. Contact: Betsie A. Taylor, KNLA Exec. Dir., 216 Pendleton Lane, Frankfort, Ky. 40601, 502.695.0106; Fax, 502.695.8455; e-mail, mail.knla@gmail.com; url, http://www.knla.org

January 29, 2013 – Northern Kentucky Arborist, Landscaper & Nursery Worker Seminar. Contact: Mike Klahr, 859.586.6101; url, http://www.ca.uky.edu/HLA/Dunwell/NoKYCommercialArboristLandscaperNurseryWorkerSeminar_2013.pdf

Also check out:

The CKOTA Presents Our 32nd Horticulture Conference on February 14, 2013 at the Fayette County Cooperative Extension Office, 1140 Red Mile Place, Lexington, KY 40504-1172. For more information contact John Sanders, 859.983.2041 or see http://www.ckota.org

UK's Turf and Landscape Management Short Course has been shortened to two days, February 27-28, 2013 at the Crowne Plaza Hotel, Phillips Lane, Louisville, KY. For more information contact Linda Williams, ltapp@uky.edu; url, http://www.uky.edu/Ag/ukturf

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