It would be great if there were "organic" herbicides that were as effective as the widely used glyphosate-based, non-selective herbicides such as Roundup. Unfortunately, organic herbicides currently available to consumers are not effective at controlling perennial broadleaf and grassy weeds as illustrated by a recent demonstration project at the University of Minnesota.
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Terry L. Ettinger Horticulture Consulting Services takes no direct or implied responsibility for the information or recommendations found at any other website. Please keep in mind that all do-it-yourself activities involve a degree of risk. Skills, materials, tools, and site conditions vary widely. The reader remains responsible for the selection and use of tools, materials, and methods. Always obey local codes and laws, follow manufacturers’ operating instructions, and observe safety precautions at all times. Please read all labels carefully before purchasing, applying and storing any pesticide.