I've used the Preen made for vegetable gardens on my father in law's garden with very good results. First year we didn't do anything and he spent every day pulling weeds, which was fine since he was retired. The next year we covered the garden with preen when everything was at prescribed height, and he was mad that he didn't have anything to do. Only ingredient is corn gluten meal.

 

What is DDG and where do you get it from?

 

US7183237B2 - Method for the use of distiller's grain as herbicide and fertilizer - Google Patents

Response of Weeds and Ornamental Plants to Potting Soil Amended with Dried Distillers Grains in: HortScience Volume 43 Issue 1 (2008) (ashs.org)

 

I bought cases of green-it liquid corn gluten meal for vegetable gardens and it was so ineffective I had to sell it for a loss with a disclaimer. The organic nitrogen in it is at least usable.

 

It's interesting to see how research in fields like lawn weed control can evolve over time. While the findings may seem contradictory, it's a reminder of the complexity of nature and the need for ongoing research.
Speaking of nature, if you're into exploring natural solutions, you might want to check out naturally food. They offer a variety of nature-inspired products that can complement your gardening efforts.
In the end, what matters most is finding solutions that work best for your specific situation. It sounds like DDG has been effective for you and many others, which is fantastic. Sometimes, practical experience can be just as valuable as scientific research.

 

It's interesting to see how research in fields like lawn weed control can evolve over time. While the findings may seem contradictory, it's a reminder of the complexity of nature and the need for ongoing research.

Welcome aboard bot