I have always saved and used layered newspapers (without the dyed circulars) as a weed barrier, under the mulch in my gardens. When I am done, the papers are not visible.
Now, I'm tackling a large area and ran out of the regular newsprint (even with friends/neighbors saving it for me). I'm considering using the sales circulars, magazines and dyed cardboard as weed barriers. We aren't growing edibles in this specific area, but it does flood. I've tried to research this, but all of the sites seem to strongly disagree about the pros and cons.
(i.e. Pro- They hold up longer than the regular newsprint, which can be helpful in some cases. Con- The dyes leach into the soil.)
So...Should I go ahead and use them in my own yard, or should I just put them in the recycling bin to go to the landfill and leach their dyes into the soil there? Everyone seems to be up in arms about these dyes! How bad can these dyes really be?