We no longer buy chemicals for our lawn. We learned through our cooperative extension office that using a mulching mower makes natural fertilizer. We've done this for a few years now , and the crab grass is gone! We have a very thick healthy lawn. We also sprinkle free used coffee grounds from Starbucks on it for a little extra fertilizer. I don't miss bagging those leaves! Any overage we rake and pile around the trees...they love this composting mulch.
Now that you mention it my crabgrass is also leaving. I got lazy and started using a mulching mower on the grass and leaves in the fall. But I still have problems with plantain (the leaves of which you can eat) and dandelions.
Do not eat anything from your lawn if you have sprayed any chemicals on them this season.
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