Abstract Five formulations of three dinitroaniline (DNA) herbicides [Surflan (oryzalin); Pre-M, Southern Weedgrass Control (pendimethalin); and Barricade (prodiamine)] were applied at 4.48 kg ai/ha (4.0 lb ai/A) every four months to container-grown landscape plants. These treatments were compared with untreated and weed-free controls, as well as the combination herbicides Rout and Ornamental Herbicide 2 composed of oryzalin or pendimethalin, respectively, [1.12 kg ai/ha (1.0 lb ai/A)] with Goal (oxyfluorfen) [2.24 kg ai/ha (2.0 lb ai/A)]. The combination herbicides caused the greatest amount of acute phytotoxicity, severely damaging Hemerocallis hybrid ‘Aztec Gold’ and Liriope muscari ‘Big Blue’. Water dispersable granular formulations of Pre-M (pendimethalin) and Barricade (prodiamine) were phytotoxic to Photinia × fraseri while the granular formulations were not. Surflan (oryzalin) caused the greatest reduction in crop growth and was the only treatment that reduced survival. Surflan (oryzalin) and Ornamental Herbicide 2 (pendimethalin + oxyfluorfen) inhibited daylily flowering 98% and 65%, respectively. Hairy bittercress (Cardamine hirsuta), spotted spurge (Chamaesyce maculata), and yerba-de-tago (Eclipta alba) control generally was best with Barricade (prodiamine) and treatments containing Goal (oxytluorfen). All herbicides, except Surflan (oryzalin), reduced weed biomass after two herbicide applications. All herbicides provided significant weed control after three applications.