Quote:
Originally Posted by CookieCows
the only thing we've used on our lawn is round up around the edges so
should we be ok for the rest of the lawn? We have never used anything like weed and feed and I don't think anyone near us does as one of the first things our neighbor told us when we moved in was that it's a waste of time with hay trucks going back and forth .. seeds flying everywhere.
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"Roundup" is the chemical glyphosate, which is a non-selective herbicide; thus it kills
everything it touches.
Specialty lawn weed controls like 'weed & feed' and 'trimec' are selective herbicides.
They're designed to
selectively kill all the 'broadleaves' while leaving grassy vegetation alone. When you look on the label you'll often see '2, 4-D' as one of the key ingredients.
What you've got to watch out for when looking for edible greens is to be careful not to pick from any areas where any
selective herbicides for broadleaf control may have been sprayed.
These chemicals 'hang around' and linger in the soil structure sometimes for
years after their applied (especially if they were initially MIS-applied, which many homeowners do with them!)
So, to answer your question; you're perfectly fine picking dandelions from areas in and around areas where you've sprayed Roundup in the past.
The chemical glyphosate has a very short half life- It does its job and is gone EXTREMELY quickly.