The Organic Agriculture Centre has a "select business partner" in Nano-Gro a product of Agro Nanotechnology Corporation.
It is an Omri approved product because they are "just really small particles made naturally and work like homeopathy". OMRI does acknowledges though (in an email, where I heard the previous sentence) that there is confusion and lack of consensus on a definition for nanotechnology.
The company website offers little help in describing Nano Gro:
"Nano-Gro™ is an organic plant growth regulator and immunity enhancer which stands apart from any product in the market.
Unlike a fertilizer, Nano-Gro™ is not a source of nutrients for plants. And unlike other primers it is not composed of proteins derived from bacteria or other pathogens.
Nano-Gro™ does not contain hormones and does not, in any way, change the genetic structure of plants.
Nano-Gro™ helps plants naturally experience improved growth and health.
Nano-Gro™ is a systemic acquired resistance inducer that works unlike any other primer on the market. It works by delivering information to the plant. Using our proprietary formula, when a plant comes into contact with Nano-Gro™ it is compelled to activate a series of natural processes that help the plant achieve its maximum potential".
OK so what is it?
We can't know because it is "proprietary". We have to trust the word of those thus partnered. I guess.
Unlike Canada, the Soil Association (Organic Certifying Body) in Britian has banned nanoparticles from Organic Production.
I think its just a matter of time before the economic argument will hold sway.