Source: UNIVERSITY OF FLORIDA submitted to NRP
EVALUATION AND INTRODUCTION OF NURSERY/LANDSCAPE PLANTS
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
COMPLETE
Funding Source
HATCH
Reporting Frequency
Annual
Accession No.
0232329
Grant No.
(N/A)
Cumulative Award Amt.
(N/A)
Proposal No.
(N/A)
Multistate No.
(N/A)
Project Start Date
Oct 1, 2012
Project End Date
Sep 30, 2017
Grant Year
(N/A)
Program Code
[(N/A)]- (N/A)
Recipient Organization
UNIVERSITY OF FLORIDA
G022 MCCARTY HALL
GAINESVILLE,FL 32611
Performing Department
North Florida Research and Education Center, Quincy
Non Technical Summary
Production of ornamental and landscape plants is one of the largest agricultural commodity groups in Florida and many other states in the U.S. Consumers and landscape professionals are demanding new or high-performing landscape plants. Universities and the nursery and landscape industries are responding to this need by collecting species and selecting or breeding to release new or high-performing landscape plants. These efforts, in turn, require research and outreach in areas such as nursery/greenhouse production, landscape performance, disease and insect susceptibility, climatic adaptability and, for non-native species, risk of invasiveness in Florida. Organized plant evaluations in nursery, field or garden settings generate useful information on the suitability of particular landscape plants for specific functions in various soil, climatic and hardiness zones. Examples of plant evaluations include trialing of new shrub rose (Rosa spp.) cultivars for adaptability in Florida, screening newly discovered Magnolia spp. for suitability as landscape plants, evaluating Nandina domestica cultivars for invasive potential, ex situ conservation of threatened or endangered Magnolia spp. in our botanical garden, and evaluating crapemyrtle (Lagerstroemia spp.) and rose (Rosa spp.) selections for disease susceptibility. Results of these research studies will assist growers, landscapers and consumers in choosing, growing and using appropriate plants that enhance the beauty and function of landscapes while reducing use of natural resources, minimizing inputs of fertilizer and pesticide and creating more sustainable landscapes in Florida.
Animal Health Component
(N/A)
Research Effort Categories
Basic
(N/A)
Applied
(N/A)
Developmental
(N/A)
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
2022160106040%
2042110106030%
2052110106030%
Knowledge Area
204 - Plant Product Quality and Utility (Preharvest); 205 - Plant Management Systems; 202 - Plant Genetic Resources;

Subject Of Investigation
2110 - Ornamental trees and shrubs; 2160 - Arboreta and botanical gardens;

Field Of Science
1060 - Biology (whole systems);
Goals / Objectives
The overall goal is that consumers and nursery/landscape professionals will grow and use landscape plants that reduce use of natural resources, create more sustainable landscapes and improve Floridians quality of life while also enhancing the economic sustainability of the nursery/landscape industry. Objectives are to identify, evaluate and distribute taxa of new, underused or improved landscape plants that: minimize inputs of water, fertilizer and pesticide; contribute ecosystem services without invading natural areas; and enhance the beauty and function of Florida landscapes. Evaluation criteria may include growth, ornamental characteristics, disease/pest susceptibility, maintenance needs, invasive potential (if non-native), benefits to pollinators and wildlife, absorption of excess water, nutrients, pollutants and carbon dioxide and overall adaptability to USDA Zone 8b. When possible, plant performance will be compared to other sites in Florida and the Southeast. Expected outputs include research to assess plant performance, collaborations with other scientists pursuing similar research, developing collections of taxa for research, displaying plants and dissemination of results through field days, tours, reports, publications and websites. This evaluation process is on-going and may last a decade or more for each species since woody landscape plants grow and mature over a period of many years. Short-term goals are to inform nursery/landscape professionals and consumers about the results of these evaluation efforts and persuade these audiences to choose plants identified as adaptable or superior by these evaluations. Long-term goals are to identify or develop new, superior landscape plants for Florida and introduce or promote them to Florida consumers and nursery/landscape professionals.
Project Methods
The investigator will select taxa to evaluate, use experimental designs and methods as appropriate, establish field or garden plantings at UF-NFREC or elsewhere as needed, and develop uniform methods of assessing plant performance or collecting and recording data. Formal research evaluations will utilize multiple planting locations, years, appropriate experimental designs and statistical analysis with the goal of refereed scientific publications. Informal plant evaluations, including placement in the NFREC botanical garden ("Gardens of the Big Bend"), are used to: gain knowledge about the plants; display and promote the plants to consumers and nursery/landscape professionals; develop Extension programs and outreach resources (i.e., publications); and develop preliminary information for possible research. Ongoing and final results for formal and informal evaluations will be reported at field days, seminars, workshops and in appropriate publications, websites and other outreach mechanisms.

Progress 10/01/12 to 09/30/17

Outputs
Target Audience:Target audiences reached included nursery growers, landscape professionals, county agents, Master Gardeners and consumers. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?1st Annual China NanZhao Yulan Magnolia Symposium,NanZhou County, Henan, China. Mar. 22-23, 2017. Third International Symposium on the Family Magnoliaceae, Varadero, Cuba. Nov. 29 - Dec. 2, 2016. How have the results been disseminated to communities of interest?Knox, Gary. 2017. 1st Annual China NanZhao Yulan Symposium, Opening Presentation: Magnolias Around the World. 1st Annual China NanZhao Yulan Symposium, NanZhou County, Henan, China. Mar. 22, 2017. Knox, Gary W. 2016. Third International Symposium on the Family Magnoliaceae: Towards the future of magnolia conservation and cultivation. Third International Symposium on the Family Magnoliaceae, Varadero, Cuba. Nov. 29, 2016.. Knox, Gary W. 2016. Investigations of health, reproductive capacity and species distribution of the endangered Magnolia macrophylla var. ashei. Third International Symposium on the Family Magnoliaceae, Varadero, Cuba. Dec. 2, 2016. Knox, Gary W. 2016. Garden Tour of Outstanding Plants. Art & Garden Fall Festival, Quincy, Florida. Oct. 1, 2016. Knox, Gary W., 2016. Alternatives to Turfgrass Lawns. Northwest District Florida Regional Master Gardener Conference, Quincy, Florida. Oct. 27, 2016. Knox, Gary W. 2017. Ashe magnolia research. Monthly Meeting of the Magnolia Chapter of the Florida Native Plants Society, Tallahassee, FL. Jan. 5, 2017. Knox, Gary W., 2016. Plants for Pollinators. Gardening for Pollinator Conservation Workshop, Quincy, Florida. Oct. 13, 2016. What do you plan to do during the next reporting period to accomplish the goals? Nothing Reported

Impacts
What was accomplished under these goals? 1) Major activities completed/experiments conducted:Collections and data continue with the NFREC Magnolia spp. collection, part of the National Collection of Magnolia (as regulated by the North American Plant Collections Consortium, APGA and USDA). 2) Data collected: Data are collected on the above projects plus informally on plants in Gardens of the Big Bend, our teaching and botanical garden. 3) Summary statistics and discussion of results: Publications are being prepared relating to Magnolia spp., and others. 4) Key outcomes or other accomplishments realized: Results published indicate selections to be recommended for use in the Gulf Coast/Coastal Plain area of the southeastern United States.

Publications

  • Type: Journal Articles Status: Published Year Published: 2016 Citation: Fetouh, Mohammed I., Abdul Kareem, Gary W. Knox, Sandra B. Wilson and Zhanao Deng. 2016. Induction, identification, and characterization of tetraploids in Japanese privet (Ligustrum japonicum). HortSci. 51(11):1371-1377.
  • Type: Other Status: Published Year Published: 2017 Citation: Knox, Gary W. 2017. Plant cupheas for summer flowers, hummingbirds, and more. Gardening in the Panhandle. Aug. 17, 2017. 2 pp.


Progress 10/01/15 to 09/30/16

Outputs
Target Audience:Target audiences reached included nursery growers, landscape professionals, county agents, Master Gardeners and consumers. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?County agents and Master Gardeners: Presentation on New Plants by me at the Statewide Master Gardener Conference, Oct. 20, 2015. Alabama county agents: Presentation and tour on New Plants and Gardens of the Big Bend, UF/IFAS NFREC-Quincy, Oct. 23, 2015. Nursery, greenhouse and landscape professionals: Update on NFREC research given by me at Georgia-Florida Green Industry Update, UF/IFAS NFREC-Quincy, Nov. 10, 2015. County agents and extension specialists: Presentations by me on crapemyrtle bark scale and rose rosette disease at Urban Landscape Summit, UF/IFAS, Gainesville, March 17, 2016. How have the results been disseminated to communities of interest?Orange Co. Ext., Orlando, FL: Landscape University. (me on crapemyrtle) (12/10/15) GGIA WInterGreen/CANR, Atlanta, GA: Update on crapemyrtle bark scale. (1/22/16) Duval Co. Extension, Jacksonville, FL:A Day of Gardening: Standouts and Shoutouts from Gardens of the Big Bend and Crapemyrtle Bark Scale Pest Alert (2/27/16) Big Bend FNGLA Meeting, Cairo, GA: Update on Boxwood Blight and Rose Rosette (3/10/16) Jackson Co. MGs, Quincy, FL: Magnolias, Crapemyrtles, and Gardens of the Big Bend (3/7/16) Walton Co. MGs, Quincy, FL: Magnolias, Crapemyrtle Bark Scale and Gardens of the Big Bend (3/17/16) Garden Club of Northeast Florida, Jacksonville, FL: Magnolias, conifers and others (4/29/16) Goodwood Plantation, Tallahassee, FL: Succulents (6/3/16) Perennial Peanut Field Day, Quincy, FL: RP, the best alternative to lawn turfgrass (7/23/16) TNLA Expo, Houston, TX: All about Crapemyrtles: Pests, diseases and disorders (8/20/16) MREC, Apopka, FL: New Ornamental Plants Update: Amazing new magnolias (9/8/16) MREC, Apopka, FL: New Ornamental Plants Update: Crapemyrtle: New selections, new problems (9/8/16) What do you plan to do during the next reporting period to accomplish the goals?I plan to continue collecting and analyzing data and summarizing, publishing and discussing results with communities of interest.

Impacts
What was accomplished under these goals? 1) Major activities completed/experiments conducted: a) Collections and data continue with the NFREC Magnolia spp. collection, part of the National Collection of Magnolia (as regulated by the North American Plant Collections Consortium, APGA and USDA). 2) Data collected: Data are collected on the above projects plus informally on plants in Gardens of the Big Bend, our teaching and botanical garden. 3) Summary statistics and discussion of results: Publications are being prepared relating to Magnolia spp., and others. 4) Key outcomes or other accomplishments realized: Results published indicate selections to be recommended for use in the Gulf Coast/Coastal Plain area of the southeastern United States.

Publications

  • Type: Journal Articles Status: Published Year Published: 2016 Citation: Freyre, Rosanna, Zhanao Deng, Gary W. Knox, Steven Montalvo and Victor Zayas. 2016. Fruitless Ruellia simplex R12-2-1 (Mayan Compact Purple). HortSci. 51(8):1057-1061. August 2016.
  • Type: Journal Articles Status: Published Year Published: 2016 Citation: Iriarte, Fanny, Mathews Paret, Gary Knox, Tim Shubert, Ayyamperumal Jeyaprakash and David Davison. 2016. First report of boxwood blight caused by Calonectria pseudonaviculata in Florida. Plant Health Progress 17:229-231.


Progress 10/01/14 to 09/30/15

Outputs
Target Audience:Target audiences reached included nursery growers, landscape professionals, county agents, Master Gardeners and consumers. Changes/Problems:Inadequate funding reduces our ability to collect and analyze data as well as obtain, plant and maintain plantings. What opportunities for training and professional development has the project provided? Nothing Reported How have the results been disseminated to communities of interest?Results have been disseminated at the following events/venues: Gardening Friends of the Big Bend Montly Meeting: Invasive Plants (1/17/15) Georgia Green Industry Association: Center for Applied Nursery Research: Summary of Keteleeria and Crapemyrtle Research (1/21/15) GFBB: Magnificent Magnolias: Best Performers from Gardens of the Big Bend (02/14/15) Leon Co. MGs: Invasive plants (5/5/15) GFBB Workshop on Succulents and Hardy Bromeliads and Dry Garden Grand Opening (05/30/15) Art & Garden: Garden Tours (10/4/14) What do you plan to do during the next reporting period to accomplish the goals?I plan to continue collecting and analyzing data and summarizing, publishing and discussing results with communities of interest.

Impacts
What was accomplished under these goals? 1) Major activities completed / experiments conducted: a) Formal plant evaluations were completed and published forArachis glabrata andvarious ornamental grasses. b)Collections and data continue with the NFREC Magnolia spp. collection, part of the National Collection of Magnolia (as regulated by the North American Plant Collections Consortium, APGA and USDA). 2) Data collected: Data are collected on the above projects plus informally on plants in Gardens of the Big Bend, our teaching and botanical garden. 3) Summary statistics and discussion of results: Publications are being prepared relating toMagnolia spp., and others. 4) Key outcomes or other accomplishments realized: Results published indicate selections to be recommended for use in the Gulf Coast/Coastal Plain area of the southeastern United States.

Publications

  • Type: Journal Articles Status: Published Year Published: 2015 Citation: Andersen, B.D., G.W. Knox, A.R. Blount, C.L. Mackowiak and E.F. Gilman. 2015. Ornamental groundcover characteristics of rhizoma peanut (Arachis glabrata Benth.): Shade affects height but not cover. HortSci. 50(7):952-956. July 2015.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2014 Citation: Calderone Ripak, N., K. Moore, S. Wilson, Z. Deng and G. Knox. 2014. Survival of Ornamental Grasses from North Florida to South Florida. Proc. Southern Nursery Assn. Res. Conf. 59:124-128.
  • Type: Other Status: Published Year Published: 2014 Citation: Knox, G.W. 2014. Paran� Pine, Araucaria angustifolia: An Ancient-Looking Conifer for Modern Landscapes, ENH 1248. Florida Cooperative Extension Service, University of Florida, Institute of Food and Agricultural Science, Gainesville, FL. 3 pp. November 2014.
  • Type: Other Status: Published Year Published: 2015 Citation: Knox, Gary W. 2015. Late flowering magnolias avoid freeze damage. Gardening in the Panhandle. Weekly Horticulture WordPress newsletter for the general public. Northwest Florida District.


Progress 10/01/13 to 09/30/14

Outputs
Target Audience: Consumers, nursery/landscape professionals and county Extension faculty. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided? This project enabled me to teach about new plants, learn about plants and exchange plants in a number of venues, including: Gulf States Hort Expo. Mobile AL. Jan. 28-31, 2014. Annual meeting of Magnolia Society International. Athens GA. Mar. 20-23, 2014. Leon County Master Gardener Association, Tallahassee, FL. Mar. 10, 2014. Taylor County Master Gardener Association, Perry, FL. Mar. 11, 2014. Water in the Garden Workshop. Gardening Friends of the Big Bend, Quincy FL. May 10, 2014. Environmental Horticulture Statewide Retreat. UF, Gainesville FL. May 12-13, 2014. Southern Region Extension Research Activity (SERA) 27 annual meeting. Hammond LA. June 3-5, 2014. Margie Jenkins Horticulture Lecture Series, LSU AgCenter, Hammond LA. June 5, 2014. Rhizoma Perennial Peanut Field Day, UF-NFREC, Quincy FL. June 7, 2014. Florida Turfgrass Expo and Field Day, UF-WFREC, Jay FL. June 18, 2014. Annual meeting of the American Public Gardens Association. Denver CO. June 25-27, 2014. Annual meeting of the NAPCC Magnolia Group, APGA. Denver CO. June 26, 2014. Southern Plant Conference. Atlanta GA. July 22, 2014. Southern Nursery Association (SNA) Research Conference and Trade Show, SNA. Atlanta GA. July 21-24, 2014. Annual Meeting of the American Society for Horticultural Science. Orlando FL. July 27-Aug. 1, 2014. Small Gardens Symposium, APGA. Youngstown OH. Sept. 17-19, 2014. Scott Arboretum at Swarthmore College. Swarthmore PA. Sept. 27, 2014. Chanticleer Garden. Wayne PA. Sept. 28, 2014. Art & Garden Fall Family Festival, UF-NFREC and GFBB. UF-NFREC, Quincy FL. Oct. 4, 2014. Trip to deliver and pick up magnolias. Magnolian Arboretum, Pickens SC. Nov. 7-9, 2014. How have the results been disseminated to communities of interest? Results have been disseminated at the following events/venues (event: title, location, date): Gulf States Hort Expo: Outstanding Performers from Gardens of the Big Bend. Mobile AL. Jan. 29, 2014. Quincy Garden Club: Gardens of the Big Bend. Quincy FL. 2/04/14. Leon Co. MGs: Gardens of the Big Bend. Tallahassee FL. 3/10/14. Taylor Co. MGs: Magnolia Garden. Perry FL. 3/11/14. Water in the Garden Workshop (sponsored by Gardening Friends of the Big Bend): Rain Gardens. Quincy FL. 5/10/14. Perennial Peanut Field Day: Ornamental Rhizoma Peanut . Quincy FL. 6/07/14. Margie Jenkins Horticulture Lecture Series: Outstanding Plants from Gardens of the Big Bend. Hammond, LA.6/05/14. Gulf Coast Turfgrass Expo: New Plants. Jay FL. 6/18/14. Art & Garden Festival: Gardens of the Big BendTours. Quincy FL. 10/4/14. Meeting of Gardening Friends of the Big Bend: Thousand Mile Journey for Magnolias. Quincy FL. 11/11/14. Leon County Master Gardeners: Tour of Gardens of the Big Bend. Quincy FL. 11/12/14. WaltonCounty Master Gardeners: Tour of Gardens of the Big Bend. Quincy FL. 11/20/14. What do you plan to do during the next reporting period to accomplish the goals? I plan to continue collecting and analyzing data and summarizing, publishing and discussing results with communities of interest.

Impacts
What was accomplished under these goals? 1) Major activities completed / experiments conducted: a) Formal plant evaluations were completed and published for Nandina domestica, various ornamental grasses and Ligustrum spp. b) Formal plant evaluations are ongoing with Lagerstroemia spp. Collections and data continue with the NFREC Magnolia spp. collection, part of the National Collection of Magnolia (as regulated by the North American Plant Collections Consortium, APGA and USDA). 2) Data collected: Data are collected on the above projects plus informally on plants in Gardens of the Big Bend, our teaching and botanical garden.. 3) Summary statistics and discussion of results: Publications are being prepared relating to Lagerstroemia spp., and others. 4) Key outcomes or other accomplishments realized: Results publishedindicate selections to be recommended.

Publications

  • Type: Journal Articles Status: Published Year Published: 2014 Citation: Wilson, Sandra B., Gary W. Knox, Zhanao Deng, Keona L. Nolan and James Aldrich. 2014. Landscape Performance and Fruiting of Nine Heavenly Bamboo Selections Grown in Northern and Southern Florida. HortScience 49(6):706-713. June 2014.
  • Type: Journal Articles Status: Published Year Published: 2014 Citation: Wilson, Sandra B., Gary W. Knox, Keona L. Nolan and James Aldrich. 2014. Landscape Performance and Fruiting of 12 Privet Selections Grown in Northern and Southern Florida. HortTechnology 24(1):148-155. February 2014.
  • Type: Journal Articles Status: Published Year Published: 2013 Citation: Knox, Gary W., Matthew Chappell, Alejandro Bolques and Linda B. Landrum. 2013. Improving Nursery Sustainability Using New Extension Resources Featuring Grower-developed strategies. Proc. Southern Nursery Assn. Res. Conf. 58:24-27.
  • Type: Other Status: Published Year Published: 2014 Citation: Knox, G.W. 2014. Purple Sunset Pomegranate (Punica granatum PIIPG-1), ENH 1240. Florida Cooperative Extension Service, University of Florida, Institute of Food and Agricultural Science, Gainesville, FL. 2 pp. June 2014.
  • Type: Other Status: Published Year Published: 2014 Citation: Knox, G.W. 2014. Mexican Sycamore (Platanus mexicana), ENH 1241. Florida Cooperative Extension Service, University of Florida, Institute of Food and Agricultural Science, Gainesville, FL. 2 pp. June 2014.
  • Type: Other Status: Published Year Published: 2014 Citation: Knox, G.W. 2014. Smooth-bark Mexican Pine (Pinus pseudostrobus), ENH 1239. Florida Cooperative Extension Service, University of Florida, Institute of Food and Agricultural Science, Gainesville, FL. 2 pp. June 2014.
  • Type: Other Status: Published Year Published: 2013 Citation: Knox, G.W. 2013. Faber's Maple: Acer fabri, ENH1229. Florida Cooperative Extension Service, University of Florida, Institute of Food and Agricultural Science, Gainesville, FL. 2 pp. December 2013.


Progress 10/01/12 to 09/30/13

Outputs
Target Audience: Consumers, nursery/landscape professionals and county Extension faculty. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided? Nothing Reported How have the results been disseminated to communities of interest? Outreach to nursery/landscape professionals: Noninvasive Cultivars for the Green Industry. Georgia Green Industry Association WinterGreen Educational Programs; Center for Applied Nursery Research. Jan. 23, 2013, Atlanta, GA. Deer herbivory of “new” plants and dooryard fruits. Georgia Green Industry Association WinterGreen Educational Programs; Center for Applied Nursery Research. Jan. 23, 2013, Atlanta, GA. Jacksonville FNGLA Trade Show: New crapemyrtles. Feb. 14, 2013, Jacksonville, FL. FNGLA: Crapemyrtle pests, diseases and disorders. Feb. 19, 2013, Quincy, FL. Perennial Peanut Field Day: Ornamental Rhizoma Peanut. June 1, 2013, Quincy, FL. Sustainable Beauty Symposium: Taking the Tropics to the Mountains. June 7, 2013, Asheville NC. Outreach to Consumers: Tallahassee Camellia Society: Gardens of the Big Bend. March 5, 2013,Tallahassee, FL. Goodwood Garden Talk: Hydrangeas. May 3, 2013, Tallahassee, FL. Birds in the Backyard: Habitat. May 4, 2013, Quincy, FL. Goodwood Plantation Garden Talk: Perennials for the Big Bend. Oct. 4, 2013, Tallahassee, FL. What do you plan to do during the next reporting period to accomplish the goals? I plan to continue collecting and analyzing data and summarizing, publishing and discussing results with communities of interest.

Impacts
What was accomplished under these goals? Impact: Results of these research studies will assist growers, landscapers and consumers in choosing, growing and using appropriate plants so as to reduce use of natural resources, create more sustainable landscapes in Florida and result in an economically sustainable nursery/landscape industry. Goal: The overall goal is that consumers and nursery/landscape professionals will grow and use landscape plants that reduce use of natural resources, create more sustainable landscapes and improve Floridians' quality of life while also enhancing the economic sustainability of the nursery/landscape industry. The objective is to identify, evaluate and distribute taxa of new, underused or improved landscape plants that: minimize inputs of water, fertilizer and pesticide; contribute ecosystem services without invading natural areas; and enhance the beauty and function of Florida landscapes. 1) Major activities completed / experiments conducted: Formal plant evaluations are ongoing with Lagerstroemia spp., Nandina domestica, variousornamental grasses andRosa spp. Collections and data continue with the NFREC Magnolia spp. collection, part of the National Collection of Magnolia (as regulated by the North American Plant Collections Consortium, APGA and USDA). 2) Data collected: Data are collected on the above projects. 3) Summary statistics and discussion of results: Publications are being prepared relating to Lagerstroemia spp., Nandina domestica, andRosa spp. 4) Key outcomes or other accomplishments realized: Results to be published will indicate selections to be recommended.

Publications

  • Type: Journal Articles Status: Published Year Published: 2012 Citation: Knox, Gary W., William E. Klingeman, Mathews Paret and Amy Fulcher. 2012. Management of pests, plant diseases and abiotic disorders of Magnolia species in the southeastern United States: A review. J. Environ. Hort. 30(4):223234. December 2012.
  • Type: Journal Articles Status: Published Year Published: 2013 Citation: Knox, Gary W., William E. Klingeman, III, Amy Fulcher and Mathews Paret. 2013. Insect and nematode pests of Magnolia species in the southeastern United States. Magnolia 48(94):20-38.
  • Type: Journal Articles Status: Published Year Published: 2013 Citation: Knox, Gary W., Mathews Paret, Amy Fulcher and William E. Klingeman, III. 2013. Diseases and disorders of Magnolia species in the southeastern United States. Magnolia 48(93):29-41.
  • Type: Other Status: Published Year Published: 2013 Citation: Knox, Gary W. 2013. Gardens of the Big Bend: ACS' southernmost conifer reference garden. Southeastern Conifer 12(2):3-5. February 2013.
  • Type: Other Status: Published Year Published: 2013 Citation: Knox, G.W., S.B. Wilson, Z. Deng and R. Freyre. 2013. Alternatives to Invasive Ornamentals Commonly Found in North Florida Landscapes, ENH1206. Florida Cooperative Extension Service, University of Florida, Institute of Food and Agricultural Science, Gainesville, FL. 3 pp. August 2013.
  • Type: Other Status: Published Year Published: 2013 Citation: Knox, G.W., S.B. Wilson, Z. Deng and R. Freyre. 2013. Alternatives to Invasive Ornamentals Commonly Found in Central Florida Landscapes, ENH1207. Florida Cooperative Extension Service, University of Florida, Institute of Food and Agricultural Science, Gainesville, FL. 4 pp. August 2013.