I have used Corn Gluten for more than 8 years now. Its more of an expensive fertilizer at $32 per 50lb bag. Registered as a pesticide. We use it for a fertilizer or weed suppression on very small properties. You want to basically cover the whole ground with the granules. CGM dries out weed and grass seed when in contact with them. The biggest trick is timing the application just right, which will not happen very often. Its was promoted at 20lbs originally, people complained it didn't work. The suppliers bumped it upto 40 lbs per 1000 ft. Then people complained it was too expensive and a forklift was required to move the huge amounts of bags required to apply to lawns. So the supplier went back to suggesting 20lbs per 1000. Then people complained about the amount of N. So they came out with a useless liquid version without the N. Short Shelf Life, stinks bad. CGM is a waste of time and money. It is not sustainable, it doesn't work better over time. If you have access to EPA approved pesticides, stick with what works. You can at least make a living without going broke. One of the Moderators here has expressed his views of CGM Milogranite used to contain higher levels of metal (lou gehrig disease) I am sure Milogranite is better now.