Rita L. Hummel
Associate Professor/Associate Scientist/Extension Horticulturist
(WSU faculty member since 1985)
Areas of Interest
- Develop recycled organic materials as substrates and nutrient sources for nursery and greenhouse container production and landscape use
- Enhance water conservation in container production and landscapes
- Improve longevity of trees and shrubs in the landscape by preventing root structural defects
- Develop production practices for difficult to grow native plants
- Determine woody plant adaptation to rain gardens under Pacific Northwest environmental conditions
- Ph.D., University of Minnesota, Horticulture
- M.S., University of Minnesota, Horticulture
- B.S., South Dakota State University, Botany, Horticulture
- Washington State Nursery and Landscape Association Educator of the Year 2009
- USDA Plant Hardiness Zone Map Technical Review Team
- Morgan Fish, MS, 2013-2015
- Hummel, R.L., Craig Cogger, Andy Bary, and Robert Riley. 2014. Marigold and pepper growth in container substrates made from biosolids composted with carbon-rich organic wastes. HortTechnology 24(3):325-333.
- Hummel, Rita L. and Virginia Lohr. 2014. Urban/Suburban Streamside Demonstration Landscape Design and Implementation: Clarks Creek. Report to Washington Department of Ecology.
- Hummel, R.L., M. Elliott, G. Chastagner, R.E. Riley, K. Riley, and A. DeBauw. 2013. Nitrogen fertility influences growth and susceptibility of rhododendrons to Phytophthora ramorum. HortScience. 48(5):601-607.
- Hummel, R.L. and C. Cogger. 2012. Struvite can serve as a renewable phosphorus source for greenhouse crop production. B&B Magazine 64(4):16-17.
- CSANR Webinar ‘Struvite as a Phosphorus Fertilizer Source for Greenhouse Crop Production.’ http://breeze.wsu.edu/p29658863/
- Ophardt, M.C., and R. L. Hummel. 2011. Planting Trees and Shrubs in the Landscape. WSU Ext. Fact Sheet FS047E. pp 10. http://cru.cahe.wsu.edu/CEPublications/FS047E/FS047E.pdf
- Krucker, M., R.L. Hummel, and C. Cogger. 2010. Chrysanthemum production in composted and noncomposted organic waste substrates fertilized with nitrogen at two rates using surface and subirrigation. HortScience. 45(11):1695-1701.
- Scagel, C., R. Regan, R. L. Hummel, and G. Bi. 2010. Cold tolerance of container-grown green ash trees is influenced by nitrogen fertilizer type and rate. HortTechnology. 20(2):292-303.
- Hummel, R.L., E. Evans, and R. Riley. 2009. Effect of Mechanical Root Disruption at Transplant on Short- and Longer-term Growth and Survival of Scotch Pine (Pinus sylvestris) and Shore Pine (Pinus contorta var. contorta). pp 211-221. In: G.W. Watson, L. Costello, B. Scharenbroch and E. Gilman (eds.), The Landscape Below Ground III: Proceedings of an International Workshop on Tree Root Development in Urban Soils. International Society of Arboriculture, The Morton Arboretum, Lisle, IL.
- Cogger, C., R. Hummel, J. Hart, and A. Bary. 2008. Soil and redosier dogwood response to incorporated and surface-applied compost. HortScience. 43(7):2143-2150.