Whole-plant drag coefficients (Cd) for three plant species: Burning Bush (Euonymus alatus), Colorado Blue Spruce (Picea pungens glauca.), and Fountain Grass (Pennisetum setaceum) in five different porosity configurations were developed from force versus wind speed data collected with a force balance in a recirculating wind tunnel. The average Cd for the Burning Bush, Colorado Spruce, and Fountain Grass in their untrimmed forms were 0.42 (¿0.03), 0.39 (¿0.04), and 0.34 (¿0.06), respectively. Drag curves (Cd versus flow Reynolds number (Re) function) for the Burning Bush and Colorado Spruce were found to exhibit, for the lower porosity configurations, a rise to a maximum around flow Reynolds numbers (Re = ρuhh/ν) of 2 ¿ 105. Fountain Grass Cd was shown to be dependent upon Re to values >5 ¿ 105. The Burning Bush and Colorado Spruce plants reduced their drag, upon reaching their maxima, by decreasing their frontal area and increasing their porosity. Maximum Cd for these plants occurred at optical porosities of ~0.20. The Fountain Grass reduced drag at high Re by decreasing frontal area and porosity. The mechanism of drag reduction in Fountain Grass was continual reconfiguration to a more aerodynamic form as evidenced by continual reduction of Cd with Re.