Hi there, I landscape professionally in the Vancouver area of British Columbia Canada. I've got a site that has a fairly invasive turf weed infestation and I'd like to handle it organically, if possible. The site has about 1.25 acres of turf. In terms of dandelions, i've just gone around and gotten most of them with a weed puller, in the high profile areas, but I've got quite a bit of clover and other smaller leaf weeds. Are there times when you just have to do a herbicide run to knock down the majority of the weeds and then proceed organically from there, or might it be possible to give the site a thorough power-raking and aerating in the fall and overseed? I'm just looking for some feedback as I've been unable to find a selective, organic herbicide. Thanks, in advance, for any help.