Grocery store cornmeal is just fine, go ahead and put it down. Cornmeal is cornmeal. That article is just one in a seemingly never-ending series of screeds trying to raise the bar for "organic" care of anything, and seizing on any differences between organic and synthetic inputs, just to make the writers feel superior. Or, in this case, absurdly, between more or less "natural" inputs consisting of exactly the same stuff, just because one of them is sold in supermarkets. What a sorry waste of time the whole thing is.

I'm sorry to go on and on, and to answer your question directly, there is no reason in the world why you can't use what you have there, so go for it!

Cheers,
Paul

Just don't do like I did....and put down CRIMPED corn...over lawn that was just heavily AERATED, just before I topdressed it with 1/2- 3/4" of finished compost around the first week of March.

It's KNEE HIGH at the 4TH OF JULY !!!

(;
(;
(;

And apparantly the corn wasn't "crimped".....enough !!!

Similar to your corn field, I've had some alfalfa grow in my yard due to alfalfa pellets. Not a problem, hey, its fixing nitrogen...

I use plain stone ground yellow corn meal, rather than enriched corn meal. All available at your local grocer.