Installed about 400' x 2' mulch border around our back yard. Didn't put down any sort of weed fabric, but I did hit the area with a couple apps of glyph before mulch down. About a month later now, we're seeing some weeds pop through. Not enough that we can't hand pull them all, but it got me wondering if you guys use anything to control weeds in your mulch areas that is applied after mulch down (as opposed to the fabric or plastic).