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We discovered that there are very few commercially viable hydroponic operations that rely on natural fertility sources. The NOP has recently begun to certify hydroponic operation and allowed the use of synthetic, OMRI-listed nutrient solutions. CNG does not allow the use of these synthetic nutrient solutions. While we have heard from a few hydroponic producers who are confident it can be done, at this time the number and track record of such producers is too small to justify developing a whole new certification program.