Marengo Herbicide is labeled for broadcast or direct spray application in nurseries, production ornamentals, greenhouse floors, Christmas trees, conifers, and hardscapes but not landscape beds.
The Marengo Herbicide, while the same active ingredient as Specticle- FLO, does not have the same labeling for use rates or where it can be used. The Specticle FLO had a wider use range including turfgrass sites, whereas the Marengo cannot be applied that way. Its primary treatment areas are areas with: Production Ornamentals, Conifers, Christmas Trees, Greenhouse Floors, Production Sites and Hardscapes.
Marengo Herbicide is only lists maple and green ash as tolerable on the product label. For others you would need to keep outside of the dripline of the trees.
