- Ph D, University of Illinois; Horticulture
- MS, University of Illinois; Horticulture
- BS, The Ohio State University; Ornamental Horticulture
Professor of Landscape Horticulture and Extension Landscape Horticulturist Have been at CSU over 40 years teaching in the area of herbaceous and woody plants and nursery production and management. Works with the Green Industry especially the nursery , arboriculture, garden center and landscape contractor industries. Research deals with plant evaluation and introduction, water requirements of landscape plants and other cultural related problems with ornamentals.
O'Connor, Alison Stoven, Koski, Anthony J, Anderson, Cassey, Lentz, Amy, Langelo, Linda, Klett, James E, Shonle, Irene K, Murgel, John, Henson, Yvette, Mason, Lisa, Schweig, Sarah, Caffey, Sherie Amanda, Schrenker, Denyse, Hammond, Eric, Davidson, Deryn Thomas, Dunker, Katie, Didinger, Chelsea Marie, Ortiz Castro, Mary Carmen, Hagenbuch, Robert T, Oleszak, Hania Natalia, Hackbarth, Mari, Platten, Mark, "2022 CO-Horts Blog (blogs posted, total readership)" Blogspot
O'Connor, Alison Stoven, Langelo, Linda, Henson, Yvette, Caffey, Sherie Amanda, Davidson, Deryn Thomas, Carter, Susan, Koski, Anthony J, Ulmer, Miranda, Mason, Lisa, Harders, Kara, O'Neal, Patti, Platten, Mark, Stolzle, John, Lentz, Amy, Shonle, Irene K, Klasky, Nancy, Hammond, Eric, O'Meara, Carol A, Schweig, Sarah, Hagenbuch, Robert T, Klett, James E, Greene, Lucinda, Murgel, John, Castro, Mary Ortiz, Jones, Kurt, Hackbarth, Mari, Anderson, Cassey, "CO-Horts Blog 2021 (views, number of blogs)" Blogspot
Klett, James E, Staats, David P, Savage, Rebekah, (2020) "2019-20 Cool Season Trial Performance Report " Cool Season Trial Performance Report 34
Klett, James E, (2020) "2019-20 Cool Season Trials yields Top Picks for Off Season Color" Colorado Green 36 5 42-43
Klett, James E, Staats, David P, Schriner, Lauryn, (2020) "2020 Annual Flower Trial Report " Annual Flower Trial Report 270
Klett, James E, Staats, David P, Savage, Rebekah, (2020) "2020 Perennial Trial Garden Performance Report" Perennial Trial Garden Performance Report
O'Connor, Alison Stoven, Langelo, Linda, Henson, Yvette, Caffey, Sherie Amanda, Davidson, Deryn Thomas, Carter, Susan, Koski, Anthony J, Ulmer, Miranda, Mason, Lisa, Harders, Kara, O'Neal, Patti, Platten, Mark, Stolzle, John, Lentz, Amy, Shonle, Irene K, Klasky, Nancy, Hammond, Eric, O'Meara, Carol A, Schweig, Sarah, Hagenbuch, Robert T, Truslove, Micaela Marie, Klett, James E, Greene, Lucinda, "CO-Horts Blog 2020 (views, number of blogs)" Blogspot
Klett, James E, Markovic, Sean J, (2020) Increasing Stock Production of two Herbaceous Perennials with the Application of Plant Growth Regulators Hort Technology 30 3 421-427
Klett, James E, (2020) "Landscape Pros: Why Aren’t You Using These Recommended Trees? " Colorado Green 36 3 42-43
Greene, Lucinda, Klett, James E, (2020) "Herbaceous Perennials 7.405" Colorado State University Extension
Klett, James E, Markovic, Sean J, (2020) "Industry Pros Rate Top Picks at CSU Annual Flower Trials. " Colorado Green 35 4 42-43
Klett, James E, (2020) "Top Annuals from CSU Annual Trials" CNGA Looseleaf
O'Connor, Alison Stoven, Klett, James E, Hammond, Eric, (2020) "Columnar and Fastigiate Trees for Colorado Landscapes" Colorado State University Extension 7.427
O'Connor, Alison Stoven, Koski, Anthony J, Klett, James E, (2020) "Container Type Affects Nursery Production and Establishment of Pyrus calleryana 'Glen's Form' (Chanticleer)" International Society of Arboriculture 672-682
Klett, James E, (2020) "Multi-Site Plant Evaluation Update" CNGA Looseleaf
Klett, James E, (2020) "Hellebores for Colorado" CNGA Looseleaf
Klett, James E, (2020) "More Deciduous Trees That May Work in Colorado" Colorado Green 36 3 46-47
Klett, James E, Koski, Ronda, (2020) "Green Roof Weed Management" CNGA Looseleaf
Klett, James E, (2020) "Top Performing Perennials" Colorado Green 36 2 42-43
Klett, James E, (2020) "Industry Picks from 2019 Annual Trial Garden" CNGA Looseleaf
Klett, James E, Smith, Emma, (2020) "More Tough Perennials for Colorado Gardens" Colorado Green 36 1 44-45
Greene, Lucinda, Klett, James E, (2020) "Perennial Gardening 7.402" Colorado State University Extension
Klett, James E, Schriner, Lauryn, (2019) "Tough and Proven Perennials for Colorado" Colorado Green 35 5 50-51
O'Connor, Alison, Klett, James E, Koski, Anthony J, (2018) Container Type Affects Root Development of Chanticleer Pear (Pyrus calleryana ‘Glen’s Form’) During Landscape Establishment Arboriculture and Urban Forestry 44 4 165-173
Klett, James E, Staats, David P, Markovic, Sean, (2017) "Annual Flower Trial Report" Colorado State University 84
Klett, James E, Staats, David P, Markovic, Sean Joseph, (2017) "Annual Flower Trial Report" Colorado State University 167 pages
Klett, James E, Staats, David P, Volk, Corinne, (2017) "Cool Season Trials Performance Report" Colorado State University 20
Klett, James E, Staats, David P, Brown, Shana Gyger, (2017) "Perennial Flower Report" Colorado State University 79
Bousselot, J., Slabe, J. ``, Klett, James E., Koski, Ronda D, (2017) Photovoltaic array influences the growth of green roof plants. Journal of Living Architecture 4 3 9-18
Klett, James E, (2017) "Research Update: 2016 Superior Perennials" CNGA Looseleaf 35 1 16-17
Klett, James E, (2017) "Research Update: 2017 Plant Select®" CNGA Looseleaf 35 2 18
Meyer, M. H., Fair, B., Klett, J. E., (2017) Research Update: 2017 Switchgrass and little bluestem cultivars show performance variation across eight states in National Grass Trials HortTechnology 27 731-738
Klett, James E, (2017) "Research Update: Best plants for off-season color" Colorado Green 33 4 14-15
Klett, James E, (2017) "Research Update: Hardy and pretty: Try these shade- or sun- loving perennials" Colorado Green 33 2 16-17
Klett, James E, (2017) "Research Update: Preview top 10 annuals in the market soon" Colorado Green 33 6 14-15
Klett, James E, McKinney, David, (2017) "Research Update: Relocated perennial garden makes a strong comeback" Colorado Green 33 5 16-17
Klett, James E, (2017) "Top picks for off-season color" CNGA Looseleaf 35 4 19-21
Klett, James E, (2017) "Underutilized Trees and Shrubs for Colorado Landscapes" CNGA Looseleaf 35 3 19-20
Klett, James E, (2017) "Use these trees and shrubs to define small spaces" Colorado Green 33 3 14-15
Klett, James E, (2017) "Woody Plant Research- Some Promising, Underutilized trees" CNGA Looseleaf 34 6 14-15
Klett, James E, (2017) "Woody Plants with long-term adaptability to Colorado climate" Colorado Green 33 1 14-15
Anderson, Cassey , Klett, James E, (2017) "Expanded Shale as soil Amendment for Colorado Soils" Colorado State University
Plant Select®, Experts of, (2017) "Pretty Tough Plants: 135 Resilient, Water-Smart Choices for a Beautiful Garden" Timber Press 256
O'Connor, Alison S, Klett, James E, Koski, Anthony J, (2014) "Container Type Affects Irrigation Requirement of Viburnum trilobum 'Compactum'" American Society for Horticultural Science
O'Connor, Alison S, Klett, James E, Koski, Anthony J, (2014) "Container Type Affects Landscape Establishment and Growth of Chanticleer Pear" American Society for Horticultural Science
(2012) "2012 Flower Winners" CSU Research Update, Colorado Green 28 1 16-17
(2012) "2012 Superior Annuals" CSU Update CNGA Looseleaf 30 6 16-18
(2012) "Annual Flower Trial Garden Performance Report"
(2012) Evaluating a Natural Zeolite as an Amendment for Extensive Green Root Substrate J of Enviro Hort 30 4 201-206
(2012) Evaluation of Green Roof Plants and Materials for Semi-Arid Climates, EPA-National Center for Environmental Publications EPA/600/R-12-592 ; 78 pages
(2012) "Evergreen Shrubs" CSU Extension Fact Sheet No 7 414
(2012) "Exceptional Woody Plants" CSU Research Update, Colorado Green 28 4 10
(2012) "Horticulture Related Water Studies" Colorado Water 29 2 7-Jun
(2012) "Large Deciduous Trees" CSU Extension Fact Sheet No 7 419
(2012) "Long lived Perennials" CSU Update CNGA Looseleaf 30 5 18
(2012) "Multi-Site Trial of Woody Plants: 2006 Planting and Evaluation of Differences and Drought Tolerance of Three Amelanchier Species" MS Thesis, Spring, 74 pgs
(2012) "Nursery Tree Production and Transplant Success of Chanticlear Pear" CSU Update CNGA Looseleaf 30 3 18-19
(2012) "Nursery Tree Production and Transplant Success of Pyrus calleryana 'Glen's Form' (Canticleer) Influenced by Container Types and Overwintering Treatments" Hort Science Supplement 47 9 203
(2012) "Nursery Tree Production and Transplant Success of Pyrus calleryana 'Glen's Form' (Chanticleer) Influenced by Container Types and Overwintering Treatment" Abstract 2012 Conference Proceedings, International Society of Arboriculture, 88th Annual Conference, Portland, Oregon
(2012) "Perennial Flower Trial Performance Report"
(2012) "Perennials that Pack a Punch" CSU Research Update, Colorado Green 28 2 16-17
(2012) "Plant Select for 2013" CSU Research Update, Colorado Green 28 6 13-Dec
(2012) "Plant Trials - Highlight Four Good Woodies and Three to Avoid" CSU Research Update, Colorado Green 28 3 13-Dec
(2012) "Responses of Four Shrub Species to Four Levels of Irrigation in a Semi-Arid Environment" MS Thesis, Spring, 143 pgs
(2012) "Small Deciduous Trees" CSU Extension Fact Sheet No 7 418
(2012) "Superior Annuals from the CSU Trials" CSU Update CNGA Looseleaf 30 1 24
(2012) "Top Perennial Performers" CSU Update CNGA Looseleaf 30 2 18-19
(2012) "Try These Woody Plants" CSU Research Update, Colorado Green 28 5 13-Dec
(2012) "Weed Control in Container-Grown Herbaceous Ornamental Plants" Hort Science Supplement 47 9 330
(2012) "Woody Plant Evaluations" CSU Update CNGA Looseleaf 30 4 18-19
(2011) "2010 Annual Flower Winners" CSU Research Update, Colorado Green 27 1 14-Dec
(2011) "2010 Flower Winners" CSU Research Update, Colorado Green 27 2 16-18
(2011) "2010 Top Perennial Performers" CSU Update CNGA Looseleaf 29 2 20-21
(2011) "Alternatives to Overused Woody Plants" CSU Research Update, Colorado Green 27 4 13-Dec
(2011) "Annual Flower Trial Garden Performance Report 184 p"
(2011) "Hedges" CSU Extension Fact Sheet No 7208
(2011) "Impact of Limited Irrigation on Four Common Shrub Species" CSU Update CNGA Looseleaf 29 4 20
(2011) "Impact of Limited Irrigation on Four Common Shrub Species" Colorado Water 28 2 4-Feb
(2011) Moisture Content of Extensive Green Roof Substrate and Growth Response of 15 Temperate Plant Species During Dry Down HortScience 46 3 518-522
(2011) "Multi-Site Woody Plant Trials" CSU Update CNGA Looseleaf 29 4 20
(2011) "Multi-Site Woody Plant Trials Tracking Five Species" CSU Update CNGA Looseleaf 29 1 19
(2011) "Nursery Tree Production and Transplant Success of Pyrus calleryana ‘Glen’s Form’ (Chanticleer) Influenced by Container Types and Overwintering Treatment" Abstract Hort Sci 46 9 5325
(2011) "Perennial Flower Trial Performance Report 30p"
(2011) "Plant Select for 2012" CSU Research Update, Colorado Green 27 5 11-Oct
(2011) "Shrub Water Study: An Evaluation of Four Landscape Shrub Subjected to Different Watering Regimes" Abstract 2011 Conference Proceedings, International Society of Arboriculture, 87th Annual Conference, Sydney, Australia
(2011) "Sustainable Landscaping" CSU Extension Fact Sheet No 7 243
(2011) "Tough and Proven Perennials for Colorado" CSU Research Update, Colorado Green 27 6 13-Dec
(2011) "Try These Woody Plants" CSU Research Update, Colorado Green 27 3 14-15
(2011) "Underused Perennials for Colorado" CSU Update CNGA Looseleaf 29 6 20
(2011) "Weed Control Options in Container-Grown Herbaceous Ornamentals" CSU Update CNGA Looseleaf 29 3 20
(2011) "Woody Plant Evaluation in Colorado" MS Thesis, Spring 2011: 54 p
(2010) "2009 Annual Flower Winners" CSU Research Update, Colorado Green 26 1 14-16
(2010) "2009 Best Annual Flower List Announced" CNGA Looseleaf 27 1 11
(2010) "2009 Perennial Top Performers" CNGA Looseleaf 27 2 11-Oct
(2010) "2009 Perennial Trial Report 32p"
(2010) "2009-10 Cool Season Trial Performance Report 21p"
(2010) "2010 Best Annuals from Colorado State University" CNGA Looseleaf 27 6 19
(2010) "Annual Flower Trial Garden Performance Report 184p"
(2010) "Cool Season Top Performers" CNGA Looseleaf 27 5 12
(2010) "Cool Season Top Performers" CSU Research Update, Colorado Green 26 5 20-21
(2010) Extensive Green Roof Species Evaluation Using Digital Image Analyzer HortScience 45 8 1288-1292
(2010) "Extensive Green Roofs in Colorado: Plant Species Performance, Growing Media Modifications and Species Response to Growing Media Dry Down" PhD Thesis Spring 2010 85p
(2010) "Impact of Four Irrigation Treatment on Four Shrub Species" HortScience 45 8 29
(2010) "Impact of Limited Irrigation on Health of Four Common Shrub Species" CNGA Looseleaf 27 4 13-Dec
(2010) "Moisture Content of Extensive Green Roof Growing Media and Growth Response of 15 Plant Species During Dry Down" HortScience 45 8 44
(2010) "Multisite Woody Plant Trials" CNGA Looseleaf 27 3 11
(2010) "Preemergence Weed Control in Container Grown Hebaceous Perennials" Hort Science 45 8 111
(2010) "Superior Perennials" CSU Research Update, Colorado Green 26 6 13-14
(2010) "The True Test" Grower Talks 74 7 56
(2010) "Top-performing Perennials" CSU Research Update, Colorado Green 26 3 11-Oct
(2010) "Two Methods of Quantifying Plant Cover for Evaluating Species for Extensive Green Roof Culture" HortScience 45 8 44
(2010) "Weed Control" CSU Research Update, Colorado Green 26 4 14
(2010) "Woody Plants for Year-Round Interest" CSU Research Update, Colorado Green 26 2 11-Oct
(2010) "Xeriscapping: Perennials and Anual Flowers" Fact Sheet No 7 231
Hughes, Harrison G, Hobbs, Elizabeth Ann, Newman, Steven E, Klett, James E, Koski, Anthony J, (2005) (150) Outcome Assessment of Resident Instruction: The Colorado State University Experience HortScience 40 4 1045–1045
(1988) Effects of Pruning and Cold-Storage on Growth of Container-Grown Malus Radiant Hortscience 23 814-814
(1988) Herbicide-Organic Matter Media Interaction with 2 Container-Grown Woody Ornamentals Hortscience 23 733-733
(1988) Preemergent Weed-Control in Container-Grown Perennials Hortscience 23 27-27
(1987) Water Requirements of Herbaceous Perennials Hortscience 22 1052-1052
(1984) Evaluation of Iron Materials for Controlling Iron Chlorosis on Acer-Saccharinum L Hortscience 19 585-585
(1984) Evaluation of Some Indigenous Western Plants for Xeric Landscapes Hortscience 19 856-858
(1983) Evaluation of Iron Materials for Controlling Iron Chlorosis on Ornamental Plants Hortscience 18 851-851
(1983) The Effects of Dormant Pruning on Root and Shoot Growth of Bare-Root Trees Hortscience 18 607-607
(1983) The Potential Use of Native and Adapted Plants in Landscape Situations, Germination Aspects Hortscience 18 850-850
(1982) Evaluation of Iron Materials for Controlling Iron Chlorosis on 3 Ornamental Plant-Species Hortscience 17 577-577
(1981) Effect of Different Nitrogen-Sources and Overwintering Methods on Growth of Junipers Hortscience 16 438-438
(1980) The Effect of Additional Long Days and Split-Night Temperature on Growth and Flowering of Poinsettia Hortscience 15 389-389
