Corn Gluten is sold at most garden centers/nurseries, and I'm pretty sure it's also sold at Lowe's and Home Depot. The most popular one that I know of is called "Concern"; that's what we sell at work. ... OK, I just checked online; HD carries "Concern", Lowe's doesn't seem to carry any corn gluten meal products at all.
Many people really swear by it.. but not everyone. Here's an interesting article about it, pros and cons:
http://www.safelawns.org/blog/...
