I've noticed that in some of the Dirt Doctor's online publications he says to put out corn gluten meal around March and then again the first of June. Does anyone follow this strategy as well? I was gonna buy a bag for $19.99 at my feed store this week and put it out to prevent anymore nasty crabgrass from germinating. I already have too much of it as it is and wanna cover anymore seeds that might germinate late. Would this be wise or a waste?

CGM is a better fertilizer than it is a preemergent. You can NEVER go wrong using it to fertilizer, but in my experience and in reading studies that I trust, you can never trust it to keep weeds down. If cost is an issue, use ordinary corn meal, alfalfa, or soy bean meal, depending on what bag has the best price.

Before I changed to organic I had tried chemical preemergents...and could not tell any difference. When I changed to organic I tried CGM...and could not tell any difference. So no, I don't rely on corn gluten meal as a preemergent. I rely on dense turf to keep weeds out. Unfortunately in my back yard I HAD 95% shade and thin turf. Weeds are a problem. However we just had a storm hit us and took out all the trees on the west side of my house. Now we have full sun in the afternoons. That will make a huge difference in my back yard...at least I expect it will.