Cover crop use is increasing in the Pacific Northwest, but information is not readily available on the growth potential, biomass production, adaptability, and bloom period of warm season cover crop species and/or varieties for this region. The purpose of this study was to evaluate the growth characteristics and production attributes of commercially available warm-season cover crop varieties/cultivars in the Willamette Valley. Understanding the local adaptation and growth characteristics of different summer cover crop species/varieties will assist conservation planners and growers with optimizing cover crop selections.