I had no idea what this was but one of the first things I found on it was..
"I'm sorry, but Dutch Nutrient Formula is made by adding water to commonly available dry water-soluble powders and then sold at enormous markup. Basically you are paying 60 to 100 times the price per net pound of fertilizer as compared to say, the Peter's Brand of water soluble powders."
Not to say it doesn't do any good but it instantly turned me off to it, as it was only like the third link down after a google search, and the fact you need four parts just to mix to make a low nutrient formula that you can compare to many other organic nutrients you can find at any hydroponic store. Or other options.