So basically I have been wondering about whether to use a dif nute in promix as opposed to a straight water hydro like flood and drain. I emailed JR Peters and asked there recomendation, this is the response I got:
Thanks your interest in our products. I am going to answer your questions, but my disclaimer is we don’t formulate or trial our fertilizers for or on medical marijuana. I have included two different fert recommendations. The first is for you Promix bags. The second is for a true hydro setup. I would recommend the 17-4-17 as your grower, it is designed for growing in RO or very pure water. You may need to have some Cal-trate or Cal Nitrate on hand, also as your crop tends to be pretty calcium hungry. If you tell me a little more about how you water/ feed I can give you exact amounts. Please email me or give me a call.
Hydroponic
Veg: 150 ppm of Nitrogen 5-12-26 +Cal Nitrate.
Bloom: Blooming (First week): 300ppm of Nitrogen of 10-30-20 + extra Epsom ( 4oz/ 100 gallons)
(2nd week) back to 150 ppm of vegetative formula
Alternate between 2 formulations till the end of the growing cycle.