Sorry if this has been asked before. The Pre-emergent time is now but the label says to spray on a clean yard. Most of the new yards not treated prior have a ton of weeds. Do you guys spray with a Post emergent first then the pre or do you just stay on track. I am going to use Dimension as the pre. I have several 2,4D type products and outrider in inventory. Anybody add any 2,4 D type products to Dimension with good results?