Reply #67: CGM: Corn Gluten Meal sources.

[Dora]

I first learned about CGM in one of the organic gardening books we publish. I've also tried straight cornmeal, and I think it works too, but the CGM is probably more effective.

I buy it at The Natural Gardener here in Austin. This is what their website has to say about it (www.thenaturalgardeneraustin.com ):

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Corn Gluten
Be sure to pick some Corn Gluten for organic "weed & feed." You can apply Corn Gluten as a pre-emergent for weeds, It will prevent weed seed (or any seed) germination. It will not kill established weed. Corn Gluten is also a 9-0-0 fertilizer and great for the early spring lawn feeding. Corn gluten is not a toxic weed killer but an actual by-product of corn processing. Corn gluten is used as a food supplement for dogs, cats and livestock. For Lawns you will apply with a drop spreader set for 10 pounds per 500 square feet. For Gardens apply 2 pounds per 100 square feet and work into the top inch of soil. Please remember, you will not want to plant any type of seeds in these areas for 60 days. We have 40 pound bags of Corn Gluten.
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Here's a link from the Iowa State website about corn gluten meal sources: http://www.techtransfer.iastate.edu/en/for_industry/tec...

If you don't want to pay shipping for a 40lb bag I don't blame you. Any nursery that stocks organic gardening products should carry corn gluten meal. You might also be able to find it at a feed supply.