Corn Gluten for lawn weed control
Is this actually a viable alternative to lawn weed products? Even with the late spring this year I believe it's too late now as this would have to be used several weeks prior to dandelions first appearing in the yard.
Are any of the natural/organic weed control products on the market proving to be effective for larger scale lawn use?
Using Corn Gluten has its supporters and detractors. This reference contains some links to Corn Gluten studies; you can read them and make your own determination.
I have heard that it can be effective as pre-emergent, but it takes several years of application to really become effective. It does nothing for (weed) seeds that have already germinated; e.g. it does not work as a post-emergent.
It is a little late to apply pre-emergents.
Corn Gluten has about 10% Nitrogen so it makes a great organic lawn fertilizer. Its effect on weeds may be caused simply be the fact that, because of the nitrogen, the turf is thick and healthy.