In this study, effects of glyphosate on weed control of potted rose were determined at three locations (Taoyuan, Taichung, Tainan). Glyphosate in rose. glyphosate 1% AL was applied to weeds 5-10cm in height. Glyphosate was good for control of Cynodon dactylon, Leptochloa chinensis, Cyperus iria, Cyperus difformis, Bidens pilosa, Portulaca oleracea and Amaranthus virdis at 15 days after foliar application.