It's interesting to see people have success with plants. But the library is full of misleading books written by just such people. Because one has success in his own speck of the planet does not mean that this is the answer for the rest of the planet. It is better to depend on research that deals with many environments. For example, NTEP (National Turfgrass Evaluation Program) tests grasses at numerous land grant universities across the country - these tests are graded locally and results are published. Want to know about a certain cultivar of a certain turf species? Just go to www.ntep.org and find the answer. Another: I've seen numerous discussions on control of ground ivy (creeping charlie) over the years. Eric Kohler just finished his grad work at Purdue, doing a study of control of ground ivy. And he didn't just pluck ground ivy out of someone's yard. He collected samples from 8 states and Canada - and found that ground ivies vary dramatically depending on where they are from. He found that a combo of 2,4-D and triclopyr was the most consistent - just the combo I found ten years ago, but Eric's scientific study carries a lot more weight than my success. I'll trust Eric's observations much more than the guy who claims his dog's urine controls ground ivy, LOL. If there is really going to be advancement in organic landscape care, there has to be some real research done. Not just hype from sellers of "organic" products, or chest beating by radical tree huggers. And that means organic people putting their money where their mouth is, in funding research, just like many other ideas were proven (or disproved) in the past. A practitioner may participate is such a research program, but if someone says he does something fabulous on 50 lawns, I'll clap for him, but will probably not seriously weigh converting my program to match his. And anyone who is seriously into turf management, whether with organics or synthetics, will always say that the best pest control is a healthy turf. And of course, there is the number one rule of plant care, that few follow: "Always put the right plant in the right place." People are aghast when you tell them to start over with a lawn - "$1800, you're crazy!" But they'll spend hundreds a year, plus all the work, and still have a sick lawn, LOL. And D_S_A, C3 refers to the metabolism of cool season grasses growing in the USA, and C4 refers to warm season grasses. In grossly simple terms, they actually make their food differently. Lot easier to type C3 or C4, instead of "warm season" or "cool season" all the time. And there is a big difference in managing C3 and C4 turf.