While at Lesco the other day picking up some bags of fertilizer with Dimension in them, another landscaper sitting at the counter asked me how I fertilize my yards. I said usally I apply what i was buying (19-0-6) in the early spring instead of Lesco's Pre-Emergent. He told me that he uses Dimension one year and Pre-emergent the next and switches off every year. Anyone ever done this? Any good results?