How to treat crabgrass
My community has asked me to educate them on the best way to treat crabgrass. Many people treat it at this time of year with chemicals and I would like to provide them alternatives or the least harmful way to treat it. Is there a MG standard recommendation for treating crabgrass?
I have been told that corn gluten can be applied three times as a pre-emergent and is considered safe for the environment but there may be more effective and attractive options.
Anne Arundel County Maryland
The best method in controlling crabgrass is to apply a preemergent herbicide in the spring and again 6 weeks later.Several herbicides are listed on the attached publication.http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG101%20Guide%20to%2...
The problem with using corn gluten in Maryland is that the amount of fertilizer contained in the product exceeds the annual amount of nitrogen allowed.http://extension.umd.edu/hgic/umd-extension-lawn-fertilizer-schedule-home-lawns